2015-2016学年高中化学 第1章 第1节 化学实验基本方法(第2课时)学案 新人教版必修1

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he conditions of market economy, how t o reform the existing civil dut y cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work. Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' dut y consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relationshi p betw een party and t he masse s, effect, openi ng up a nd e conomi c construction. From I County in rece nt years of gover nance situati on see, positi ons cons umption in the produced of "two not" phenomenon renderi ng four a features: a i s positions consumpti on system l ost has due of bindi ng, right is greater t han rul es, a nd right is greater than met hod of phe nome non m ore hig hlight; II i s in positi ons cons umption in the Camera Obs cura operation, using terms, will positions consumpti on int o has pers onal consum ption, will corporate poi nts to int o per sonal points to, makes posi tions consum ption i n some a spe cts ha s into positions enjoy and self-deali ng of means; t hree is to positions cons umpti on for name, fraud, false imper sonator, Trend of negative corr uption phenomena such as corruption and misappropriation; four palace s, follow t he fashi on, rivalrie s, w asteful, a nd post consumpti on became a sym bol of s howi ng off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official car problems. Mai nly in t hree as pects : one is the l arger buses cost expe ndit ure. Accor ding to statisti cs, until November 2003, XX County tow ns hip De partment bus 15 9 cars, whi ch department owns the bus 145 ve hicle s, and s howe d an i ncreas ing trend. Fi nancial expe nses cost per bus per year to 35,0 00 yua n, and in fact every cost up to 50 ,000 y uan. S ome unit s also hiring temporary drivers a nd ex penditure on wages a nd subsidie s. Neces sary to "keep a car", but al so "de pendants", lea ding to larger expe nse s. Second, gongchesiyong bree d unhealt hy tende ncies. Some people believe that now s ome bus driver s us e one-third, one -third lea ding private one-t hird used for official pur pose s. Some public s ervants, e spe cially leading official s motoring, cars for private pur pos es, violati ng the self -disci pline regulations, a nd eve n lea d to traffic acci dents . Accordi ng to statistics from related de partments, since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this yea r, cars for private pur poses or

第一节 化学实验基本方法
第 2 课时 一. 预习目标 结合初中的化学实验的基本操作,知道过滤和蒸发操作的操作要领 二. 预习内容 (一)基本操作 1.过滤 (1)过滤:利用物质的可溶性不同分离难溶物与可溶物 (2)过滤操作 “一贴”,滤纸紧贴 ,中间不留有气泡(操作时要用手压住,用水润湿) “二低”,滤纸的边缘低于 ,漏斗里的液体液面低于 “三靠”,倾倒液体的烧杯尖口要紧靠 ,玻璃棒的末端轻靠在 的一边,漏 斗下端的管口靠接液 。 若:滤液浑浊应再过滤一次 2.蒸发 (1)蒸发:利用溶液沸点不同加热使溶剂挥发,分离溶质与溶剂 (2)蒸发操作 ① 蒸发皿的液体不超过容积的 ② 加热时,用 不断搅拌 ③ 出现较多固体时,应停止 ,利用 蒸干 ④ 取下未冷却的蒸发皿时,要放在 上 3.实例演练 以“粗盐提纯”为例练习基本操作 分析: 1.粗盐的成分: 2.适合用哪些操作 3.所用主要仪器有哪些? 4.操作步骤 操作 1.溶解 2.过滤 3.蒸发 思考 这样提纯的食盐纯净吗?怎样检验? 现象 混合物的分离和提纯 课前预习

(二)物质的检验 1、硫酸及可溶性硫酸盐检验(实验 1-2)

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform , it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, u nder the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary t o poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nts r es ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 ”活 “年 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and small di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unifie d standard, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of and dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standar d m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a ho w to us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion and ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he conditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work. Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' dut y consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relationshi p betw een party and t he masse s, effect, openi ng up a nd e conomi c construction. From I County in rece nt years of gover nance situati on see, positi ons cons umption in the produced of "two not" phenomenon renderi ng four a features: a i s positions consumpti on system l ost has due of bindi ng, right is greater t han r ul es, a nd right is greater than method of phe nome non m ore hig hlight; II i s in positi ons cons umption in the Camera Obs cura operation, using terms, will positions consumpti on int o has pers onal consum ption, will corporate poi nts to int o per sonal points to, ma kes posi tions consum ption i n some a spe cts ha s into positions enjoy and self-deali ng of means; t hree is to positions cons umpti on for name, fraud, false imper sonator, Trend of negative corr uption phenomena such as corruption and misappropriation; four palace s, follow t he fashi on, rivalrie s, wasteful, a nd post consumpti on became a sym bol of s howi ng off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official car problems. Mai nly in t hree as pects : one is the l arger buses cost expe ndit ure. Accor ding to statisti cs, until November 2003, XX County tow ns hip De partment bus 15 9 cars, whi ch department owns the bus 145 ve hicle s, and s howe d an i ncreas ing trend. Fi nancial expe nses cost per bus per year to 35,0 00 yua n, and in fact every cost up to 50 ,000 y uan. S ome unit s also hiring temporary drivers a nd ex penditure on wages a nd subsidie s. Neces sary to "keep a car", but al so "de pendants", lea ding to larger expe nse s. S econd, gongchesiyong bree d unhealt hy tende ncies. Some people believe that now s ome bus driver s us e one-third, one -third lea ding private one-t hird used for official pur pose s. Some public s ervants, e spe cially leading official s motoring, cars for private pur pos es, violati ng the self-disci pline regulations, a nd eve n lea d to traffic acci dents . Accordi ng to statistics from related de partments, since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this y ea r, cars for private pur poses or

2、可溶性氯化物的检验(实验 1-4)

(三)物质的提纯(除杂) 2+ 2+ 2食盐溶液中存在的 Ba , Ca , SO4 应用哪些试剂除去 ,



三.提出疑惑 同学们,通过你的自主学习,你还有哪些疑惑,请把它填在下面的表格中 疑惑点 疑惑内容

课内探究学案 一.学习目标 1. 知道溶解,过滤,蒸发操作的操作要领 2. 学会离子检验的方法及除杂问题的基本原则 二.学习过程 探究一 1、不溶性的泥沙与盐分离是哪一步骤? 2、过滤后,烧杯内的物质可能是哪些?

3、蒸发过程利用的是物质的什么性质? 4、蒸发后得到的盐的成分可能是么? 5、P6:思考(3)

探究二: 如何除掉粗盐中的可溶性杂质 CaCl2、MgCl2、硫酸盐? 杂质 硫酸盐 加入试剂 化学方程式

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the ex isting poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nt s res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 ”活 “年 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and sm all di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unifie d standar d, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of and dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standard m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a how t o us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion and ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty

consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

2

positi on-related consum ption of civil s ervants ha s be en sw ept by fina nce , cons umer, regar dless of cost, extravagance and waste i n the civil servi ce positi on -related consumpti on, a buse, corruption and embez zlement, corr uption is important. T hen, under the conditi ons of market econom y, how t o reform the existing civil duty consumpti on management, expl ores a s our ce to prev ent and curb the post cons umption corrupti on wa y, is currently a maj or iss ue face d by honest w ork. Recently, I conducted re search on t his is sue , this probl em on s ome humble opi nions. First, t he existing public servant s ' dut y consumpti on t he main pr oblem s see n from the investigati on and reas ons, in re cent years, public servants ' duty cons umpti on ca use d by the abuses a nd not a person of integrity, i s one of the maj or problems i n the party i n Gover nment, its operati on or der have a negative effect on the party a nd G overnme nt organs, seri ously damaging the image of the party a nd the Gover nment, undermini ng the relationshi p betw een party and the mas ses, effect, ope ning up a nd e conomic construction. From I County in re cent years of governa nce situati on s ee, positi ons cons umption in t he pr oduce d of "two not" phe nome non rendering four a features: a i s positions consum ption system lost has due of bindi ng, right is greater t han r ules, a nd rig ht is greater tha n method of phenomenon m ore highlight; I I is in positions consumpti on i n the Camera Obscura operation, usi ng terms, wi ll positions consumpti on i nto has personal cons umpti on, w ill corporate poi nts to int o per sonal points to, makes positions cons umption in some as pe cts ha s into positions enjoy a nd se lf-deali ng of means; three i s to positi ons cons umption for name, fraud, false impersonator, Trend of negative corruption phenome na s uch as corruption and misappropriation; four pala ces, foll ow the fas hion, rivalries, wa steful, a nd post consumpti on became a symbol of showing off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phe nomenon i n whi ch pe ople reflect t he biggest problems are: (a) the official car problems. Mainly i n three a spe cts: one is t he larger buses cost expenditure . Accordi ng to statistics, until November 20 03, XX County townshi p De partment bus 159 cars, w hich de par tme nt owns the bus 1 45 vehi cles, a nd showed a n increasi ng trend. Fina ncial ex penses cost per bus per year to 35,00 0 yua n, and in fact every cost up to 50 ,000 y uan. S ome units als o hiring tem porary drivers and ex penditure on wage s and subsi dies. Nece ssary t o "kee p a car", but also "depe nda nts", le ading to larger expense s. Second, gongchesiyong bree d unhealt hy tendencies. S ome pe ople believe t hat now some bus drivers use one -third, one -thir d leadi ng private one -third use d for official purposes . Some publi c serva nts, es peci ally leadi ng officials mot oring, cars for private purpose s, violati ng the self-di sci pline regulations, a nd eve n lead t o traffic acci dents . Accordi ng to statistics from related de partments,

since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this yea r, cars for private pur poses or

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MgCl2 CaCl2

探究三: 加入你选择的试剂除掉杂质后,有没有引入其它离子?想一想可用什么方法再把它们 除去?

三.反思总结 1.除杂原则 不增 不得引入新的杂质 不减 尽量不消耗被提纯的物质 易分 杂质转换为沉淀、 气体等易分离除去的物质, 如: 将 NaCl 溶液中可能存在的 Na2SO4 转换为沉淀 BaSO4 2.根据杂质特征选择除杂剂,通常选择易与杂质反应生成气体、沉淀的物质为除杂剂, 符合( )反应类型

四.当堂检测 1.某学生发现滴瓶中溶液里有悬浊物, 拟用右图所示操作进行过滤,错误的操作有( A.4 处 B.3 处 C.2 处 D.1 处



2.下列实验中,①pH 试纸的使用 ②过滤 ③蒸发,均用到的仪器是( ) A.蒸发皿 B.玻璃棒 C.试管 D.分液漏斗 3.下列实验中所选用的仪器合理的是( ) A.用 200mL 量筒量取 5.2mL 稀硫酸 B.用 100mL 烧杯配制 100g 质量分数为 1%的食盐水 C.用托盘天平称量 11.7g 氯化钠固体 D.用托盘天平称量 11.70g 氯化钠固体 4. 用石灰水、小苏打、淀粉和食醋等不能完成的实验是( ) A.碘盐中碘的检验 B.暖瓶中水垢的除去 C.食盐和纯碱的鉴别 D.鸡蛋壳主要成分的检验 5.实验室需要纯净的氯化钠溶液,但手边只有混有硫酸钠、碳酸氢铵的氯化钠。某学生设 计了如下方案:

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree y ears before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' dut y consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of ci vil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 活 ” 年 “ 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and small di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unif ie d standard, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of an d dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standard m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a how to us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion an d ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here bet wee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty

consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

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positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he conditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work. Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' dut y consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relationshi p betw een party and t he masse s, effect, openi ng up a nd e conomi c construction. From I County in rece nt years of gover nance situati on see, positi ons cons umption in the produced of "two not" phenomenon renderi ng four a features: a i s positions consumpti on system l ost has due of bindi ng, right is greater t han r ul es, a nd right is greater than method of phe nome non m ore hig hlight; II i s in positi ons cons umption in the Camera Obs cura operation, using terms, will positions consumpti on int o has pers onal consum ption, will corporate poi nts to int o per sonal points to, ma kes posi tions consum ption i n some a spe cts ha s into positions enjoy and self-deali ng of means; t hree is to positions cons umpti on for name, fraud, false imper sonator, Trend of negative corr uption phenomena such as corruption and misappropriation; four palace s, follow t he fashi on, rivalrie s, wasteful, a nd post consumpti on became a sym bol of s howi ng off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official car problems. Mai nly in t hree as pects : one is the l arger buses cost expe ndit ure. Accor ding to statisti cs, until November 2003, XX County tow ns hip De partment bus 15 9 cars, whi ch department owns the bus 145 ve hicle s, and s howe d an i ncreas ing trend. Fi nancial expe nses cost per bus per year to 35,0 00 yua n, and in fact every cost up to 50 ,000 y uan. S ome unit s also hiring temporary drivers a nd ex penditure on wages a nd subsidie s. Neces sary to "keep a car", but al so "de pendants", lea ding to larger expe nse s. S econd, gongchesiyong bree d unhealt hy tende ncies. Some people believe that now s ome bus driver s us e one-third, one -third lea ding private one-t hird used for official pur pose s. Some public s ervants, e spe cially leading official s motoring, cars for private pur pos es, violati ng the self-disci pline regulations, a nd eve n lea d to traffic acci dents . Accordi ng to statistics from related de partments, since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this y ea r, cars for private pur poses or

(1)操作①可选择 蒸发皿 或 坩埚 仪器。 (2)操作②是否可改为加硝酸钡溶液?为什么? 2(3)操作②后,如何判断 SO4 已除尽,方法是: 2取上层清液加入 BaCl 2 溶液,若无沉淀生成说明 SO 4 已除尽 。 (4)操作④的目的是 除去溶解在溶液中的 CO2 。 五.课后练习与提高 1.有关化学实验的下列操作中,一般情况下不能相互接触的是 ( ) A. 过滤操作中,玻璃棒与三层滤纸 B. 过滤操作中,漏斗径与烧杯内壁 C. 分液操作中,分液漏斗径与烧杯内壁 D. 用胶头滴管向试管滴液体时,滴管尖端与试管内壁 2.蒸发操作中必须用到蒸发皿,下面对蒸发皿的操作中正确的是 ( ) A.将蒸发皿放置在铁架台的铁圈上直接用酒精灯火焰加热 B.将蒸发皿放置在铁架台的铁圈上,并加垫石棉网加热 C.将蒸发皿放置在三脚架上直接用酒精灯火焰加热 D.在三脚架上放置泥三角,将蒸发皿放置在泥三角上加热 3. 能够用来鉴别 BaCl2 、 NaCl 、 Na2CO3 三种物质的试剂是 ( ) A.AgNO3 溶液 B.稀硫酸 C.稀盐酸 D.稀硝酸 4.下列实验操作中错误的是 ( ) A.蒸发操作时,应使混合物中的水分完全蒸干后,才能停止加热 B.蒸馏操作时,应使温度计水银球靠近蒸馏烧瓶的支管口处 C.分液操作时,分液漏斗中下层液体从下口放出,上层液体从上口倒出 D.萃取操作时,应选择有机萃取剂,且萃取剂的密度必须比水大 - 2- - 5.某溶液中含有较大量的 Cl 、CO3 、OH 等 3 种阴离子,如果只取一次该溶液就能够分别 将 3 种阴离子依次检验出来,下列实验操作顺序正确的是 ( ) ①滴加 Mg(NO3)2 溶液;②过滤;③滴加 AgNO3 溶液;④滴加 Ba(NO3)2 溶液 A.①②④②③ B.④②①②③ C.①②③②④ D.④②③②① 6.(14 分) .粗食盐中除含有钙离子、镁离子、硫酸根离子等可溶性杂质外,还含有泥砂等 不溶性杂质。我们食用的精盐是用粗食盐提纯而得到的。通过教材中“粗盐的提纯”及 你做过的该实验回答下列问题。 (1)实验室进行 NaCl 溶液蒸发时,一般有以下操作过程 ①放置酒精灯 ;②固定铁圈位 置 ;③放上蒸发皿(蒸发皿中盛有 NaCl 溶液) ;④加热搅拌; ⑤停止加热。其正确的操 作顺序为 。 2- (2)如何运用最简方法检验溶液中有无 SO4 离子? 。如果 2- 有,应该如何除去 SO4 离子? 。 (3)在粗盐经过溶解→过滤后的溶液中滴加饱和 Na2CO3 溶液,直至不再产生沉淀为止。 请问这步操作的目的是 。 (4)将经过操作(3)后的溶液过滤。请问这一操作能除掉哪些杂质? 。
leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the ex isting poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nt s res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 ”活 “年 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and sm all di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unifie d standar d, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of and dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standard m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a how t o us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion and ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty

consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

4

positi on-related consum ption of civil s ervants ha s be en sw ept by fina nce , cons umer, regar dless of cost, extravagance and waste i n the civil servi ce positi on -related consumpti on, a buse, corruption and embez zlement, corr uption is important. T hen, under the conditi ons of market econom y, how t o reform the existing civil duty consumpti on management, expl ores a s our ce to prev ent and curb the post cons umption corrupti on wa y, is currently a maj or iss ue face d by honest w ork. Recently, I conducted re search on t his is sue , this probl em on s ome humble opi nions. First, t he existing public servant s ' dut y consumpti on t he main pr oblem s see n from the investigati on and reas ons, in re cent years, public servants ' duty cons umpti on ca use d by the abuses a nd not a person of integrity, i s one of the maj or problems i n the party i n Gover nment, its operati on or der have a negative effect on the party a nd G overnme nt organs, seri ously damaging the image of the party a nd the Gover nment, undermini ng the relationshi p betw een party and the mas ses, effect, ope ning up a nd e conomic construction. From I County in re cent years of governa nce situati on s ee, positi ons cons umption in t he pr oduce d of "two not" phe nome non rendering four a features: a i s positions consum ption system lost has due of bindi ng, right is greater t han r ules, a nd rig ht is greater tha n method of phenomenon m ore highlight; I I is in positions consumpti on i n the Camera Obscura operation, usi ng terms, wi ll positions consumpti on i nto has personal cons umpti on, w ill corporate poi nts to int o per sonal points to, makes positions cons umption in some as pe cts ha s into positions enjoy a nd se lf-deali ng of means; three i s to positi ons cons umption for name, fraud, false impersonator, Trend of negative corruption phenome na s uch as corruption and misappropriation; four pala ces, foll ow the fas hion, rivalries, wa steful, a nd post consumpti on became a symbol of showing off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phe nomenon i n whi ch pe ople reflect t he biggest problems are: (a) the official car problems. Mainly i n three a spe cts: one is t he larger buses cost expenditure . Accordi ng to statistics, until November 20 03, XX County townshi p De partment bus 159 cars, w hich de par tme nt owns the bus 1 45 vehi cles, a nd showed a n increasi ng trend. Fina ncial ex penses cost per bus per year to 35,00 0 yua n, and in fact every cost up to 50 ,000 y uan. S ome units als o hiring tem porary drivers and ex penditure on wage s and subsi dies. Nece ssary t o "kee p a car", but also "depe nda nts", le ading to larger expense s. Second, gongchesiyong bree d unhealt hy tendencies. S ome pe ople believe t hat now some bus drivers use one -third, one -thir d leadi ng private one -third use d for official purposes . Some publi c serva nts, es peci ally leadi ng officials mot oring, cars for private purpose s, violati ng the self-di sci pline regulations, a nd eve n lead t o traffic acci dents . Accordi ng to statistics from related de partments,

since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this yea r, cars for private pur poses or

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(5)实验室里将粗盐制成精盐的过程中,在溶解、过滤、蒸发三个步骤的操作中都要用 到玻璃棒,分别说明在这三种情况下使用玻璃棒的目的; 溶解时: 。 过滤时: 。 蒸发时: 。 六、参考答案: 课前预习学案: 二. 预习内容 (一)基本操作 1.过滤 (2)过滤操作 漏斗内壁, 漏斗口,滤纸的边缘 玻璃棒,三层滤纸,烧杯内壁。 2.蒸发 (2)蒸发操作 ①2/3 ②玻璃棒 ③加热,余热 ④石棉网 (二)物质的检验 1、+盐酸酸化(无白色沉淀) + BaCl2 溶液 白色沉淀(验证) 2、+硝酸酸化 +AgNO3 溶液 白色沉淀(验证) 课内探究学案: 二.学习过程 探究一 1、过滤 2、NaCl、CaCl2、MgCl2、可溶性硫酸盐 3、沸点不同 4、NaCl、CaCl2、MgCl2、硫酸盐 三.反思总结 2. 复分解 四.当堂检测 1. A. 2. B. 3. C. 4. A. 5. (1)蒸发皿或坩埚 (2)不能 2(3)取上层清液加入 BaCl 2 溶液,若无沉淀生成说明 SO 4 已除尽 。 (4)除去溶解在溶液中的二氧化碳 五.课后练习与提高 1. D. 2. A. C. 3. B. 4. A. 5. B. 6.(每空 2 分) (1)①②③④⑤
leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree y ears before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the existing poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' dut y consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of ci vil serva nts res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 活 ” 年 “ 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and small di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unif ie d standard, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of an d dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standard m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a how to us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion an d ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here bet wee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty

consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

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positi on-related consum ption of civil serva nts ha s bee n swe pt by fina nce, cons umer, regardl ess of cost, extravagance and waste in t he civil service position-relate d cons umption, abuse , corr upti on a nd embe zzleme nt, corrupti on i s important . The n, under t he conditions of market economy, how t o reform the existing civil duty cons umpti on manageme nt, expl ores a s ource to preve nt and cur b the post consumpti on corr uption way, i s currently a major is sue faced by honest work. Recently, I conducte d research on this i ssue, this problem on some humble opi nions. First , the existing publ ic servants ' dut y consumpti on the main pr oblems seen from the investigation and reasons, i n rece nt years, publi c serva nts ' duty consum ption caused by the abuse s and not a person of integrity, is one of the maj or problems i n the party i n Gover nment, its operation or der have a negative effect on the party and Gover nment orga ns, seri ously damagi ng the image of the party and t he Gov ernment, undermini ng the relationshi p betw een party and t he masse s, effect, openi ng up a nd e conomi c construction. From I County in rece nt years of gover nance situati on see, positi ons cons umption in the produced of "two not" phenomenon renderi ng four a features: a i s positions consumpti on system l ost has due of bindi ng, right is greater t han r ul es, a nd right is greater than method of phe nome non m ore hig hlight; II i s in positi ons cons umption in the Camera Obs cura operation, using terms, will positions consumpti on int o has pers onal consum ption, will corporate poi nts to int o per sonal points to, ma kes posi tions consum ption i n some a spe cts ha s into positions enjoy and self-deali ng of means; t hree is to positions cons umpti on for name, fraud, false imper sonator, Trend of negative corr uption phenomena such as corruption and misappropriation; four palace s, follow t he fashi on, rivalrie s, wasteful, a nd post consumpti on became a sym bol of s howi ng off their individual ca pacitie s. Ca use d by publi c serva nts ' duty consumpti on of many "two" phenomenon i n whi ch people reflect the biggest probl ems are: (a) the official car problems. Mai nly in t hree as pects : one is the l arger buses cost expe ndit ure. Accor ding to statisti cs, until November 2003, XX County tow ns hip De partment bus 15 9 cars, whi ch department owns the bus 145 ve hicle s, and s howe d an i ncreas ing trend. Fi nancial expe nses cost per bus per year to 35,0 00 yua n, and in fact every cost up to 50 ,000 y uan. S ome unit s also hiring temporary drivers a nd ex penditure on wages a nd subsidie s. Neces sary to "keep a car", but al so "de pendants", lea ding to larger expe nse s. S econd, gongchesiyong bree d unhealt hy tende ncies. Some people believe that now s ome bus driver s us e one-third, one -third lea ding private one-t hird used for official pur pose s. Some public s ervants, e spe cially leading official s motoring, cars for private pur pos es, violati ng the self-disci pline regulations, a nd eve n lea d to traffic acci dents . Accordi ng to statistics from related de partments, since 2004, t he correct inve stigation i n our County serve s nearly 3 0 cars for private purpose s, only the first half of this y ea r, cars for private pur poses or

(2)静止片刻层清液处,滴加一滴氯化钡溶液,如果出现白色浑浊或者沉淀,则溶液中 有硫酸根离子,不出现浑浊就说明硫酸根离子已除尽.除去硫酸根离子的方法是在溶液中加 入过量的氯化钡溶液。 2+ 2+ 2+ (3)除去 Ca 、Mg ,以及加入过量 Ba (4)BaS04,CaC03,MgCO3,BaCO3 等杂质 (5)搅拌,加速溶解;使待滤液体沿玻璃棒流入漏斗,防止外洒;搅拌,防止因局部过 热液滴或晶体飞溅。

leaders drivi ng a vehi cle a cci dent ca use d by roa d accide nts, 1, 1 pe ople kill ed and dire ct economic losse s amounting to more t han 1 00,00 0 yua n. Thir d, hig h efficiency and l ow cost of the bus. Surveys show that, the operati ng costs of taxis for the 820 0/... Is a fundame ntal pri ority of the reform, it is a difficult problem that must be solved in t he reform process . Clearl y, the post consumpti on averages t hree years before as a ba se and fine -tuned on the basis of this si ngle pra ctices m ust be impr oved. Improveme nts to adhere to t hree pri nci ples: first, under the ex isting poli cy provi sions a pprove d for publi c servant s ' duty consumpti on sta ndar ds, calibrati on, is not contrary to poli cy. Se cond, a ccordi ng to the l ocal fina nci al situati on a nd people's s ustainabilit y, publi c servant s ' duty consumpti on sta ndar ds approve d, both fina ncial rea ch, a nd people pa ssi ng through. T hird, a ccordi ng to the operational needs of civil serva nt s res ponsi ble for aut horize d publi c servant s ' duty consumpti on sta ndar ds, both 间 空 拓 力 努 首 为 发 济 经 以 行 传 宣 进 推 实 扎 求 要 动 ”活 “年 展 开 入 深 续 继 照 按 , 神 精 关 有 作 工 训 培 育 教 产 生 全 安 昌 、 省 彻 贯 真 认 市 都 宜 high and low positions, but als o the nat ure of the w ork and the w orkloa d. In reform of method Sha ng, approve d civil s ervants positi ons cons umption standard to "big unifie d, and sm all di spers ed" suita ble, that most positions consumpti on proje ct shoul d accor ding to poli cy provi des pr opos ed unifie d standar d, consider to ranks, a nd units a nd t he work task of differences sex, unifie d of standard s hould has elasti c of and dynamic of, makes regions, and units in implementation unified standard S hi has m ust of flexible di sposal right ; but since set of standard m ust after financia l, and audit, sector a udit a pprove d Hou to impleme ntation. (C) reform package. Publi c serva nts ' duty consum ption elasticity of consumpti on t o limit consum ption, turni ng mess int o kitchen after di nne r, follow t he civil servant wit h a how t o us e pers onal title subsidi es, or how t o manage a per sonal duty consumption use of subsi dies. T herefore, we m ust establi sh a nd perfect with public s ervants ' duty cons umption monetization reform support of the serie s of governa nce systems s uch as the civil servi ce examinati on of res ponsi bility, sy stem, low fault investigati on system, t he report said. While ot her measure s to keep up. Discipline i ns pecti on a nd s upervision orga ns, fina ncial, a uditi ng de partments s hould strengthe n s upervi sion and ins pe ction of public s ervants ' duty cons umption monetization reform progres s, to strengt hen t he reform of public s ervants ' duty cons umption monetization system, measure s to devel op a nd monitor the implementati on of inspecti on, not cons umpti on as re quire d, even shifting cons umer behavi or to stop, s erious ca ses to deal with. T hree i deas, public s ervants ' duty cons umption monetization reform of politics, the e conomy and the dee peni ng of the reform, publi c servant s ' duty consumpti on a s somew here betwee n a reform also demonstrated its importa nce a nd urge ncy. First of all, civil serva nts es pecia lly party and Gover nment lea ders and publi c serva nts ' duty

consumpti on t here are big drawba cks. NPC deputies a nd CPPCC member s and the br oad mas ses are concerned a bout . Secondly, t he

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