化學(xué)試驗(yàn)基本方法教學(xué)設(shè)計(jì)

本文格式為Word版，下載可任意編輯——化學(xué)試驗(yàn)基本方法教學(xué)設(shè)計(jì)livingstandards,poorfarmersinlessthancompleteeliminationof4600Yuan,8949,19008.\srule\heCountyinvested2.169billionyuan,similarcountieslinethecity'sfirstcompletethe42kmofsewagepipenetworkconstruction,completionraterankedfirstinthecity,wontheprovincialruralsewagetreatmentworkbetter;keypollutionsourcessuchaselectroplating,papermaking,chemicalindustrymanagementthroughverificationandacceptanceofthemunicipalgovernment,theCountyremovedBlackandodorousRiver,Riverwaste,beginningofriverecologicalrestorationeffects.\demolitionillegalareaup2.759millionsquaremeters,completedCityissuedannualtaskof153%,splitagainstarearankingcitysecond;completed\onsquaremeters,completedCityissuedannualtaskof403%,rankingcitythird,whichvillageintheatargetcompletedtotalcityrankingfirst;CountyGovernmentwasnamedcitylevel\nced.Theseachievementsarehardwonandshouldbeappreciated.However,wearefullyaware,thenewperiod,andworkinthecountrysideandtheenvironmentfacinghigherstandardsandrequirements,provincialpartyCommitteeofferedtohighlevelbuildacomprehensivewell-offsocietygoalrequires\nofilth,dirtyenvironmentillegalbuildings,intoawell-off\palpartyCommitteealsoproposestobuildintothewell-offbenchmarkgoalsofthecity.Comparedwiththesuperiorclaim,\ofXXbeautiful\Nong\nvironmentthereareanumberofweaknessesandgaps,highlightedinthefollowingfiveaspects:first,agricultureremained\dinthequalityandlow;short,valueaddedoftheindustrychainislow;123fusionyieldlowemployeeage,lowquality.\nsmaller,specializedcooperativesthroughouttheCountytherewere3,396,butonthescaleoftoolittle.\dinproduction,management,services,decentralized,centralized,standardized,brand,informationandorganizationallevelisnothigh.Second,thecountrysideisstillin\se.\ofruralsanitationsituationhasnotchanged.\nruralhousingconstructionplanning,constructionofdisorder,nodrawings,noconstruction,novetting\nomenon,heaplyingthere.\Bad\base,villagegovernanceispoor.Thirdly,farmerscontinuedtobe\nt\d%urallaborforceaccountedfor70%overtheageof50.\Big\nce,suchasthetransactionsofpropertyrights,landreplacement;publicservicesupplygap,ruraleducation,healthcare,pensionsandotherservicescannotmeetthedemandstilldifficultforpovertyalleviation,withemphasisonpovertyalleviationand191.\d\\peasants.Fourwatereffectsstilllacks

[選材]：普通高中課程標(biāo)準(zhǔn)試驗(yàn)教科書化學(xué)1（必修）人民教育出版社

第一單元從試驗(yàn)學(xué)化學(xué)

第一節(jié)

化學(xué)試驗(yàn)基本方法

ompelling.\hthe\d,butthefloodofscientificenough,beforethetreatmentandwaterqualityimprovementafterthetreatmenteffectisnotobvious,county-widefocusonriverstilllargelyinferiorfivewater,swimmingtheRivercouldnotbefound.Fiveis\split\sahead.Noticeofstockthere,newconstructiondidnotreceivetimelytreatmenteveryyear(suchasancestralhallasunauthorisedrepeated),contrarytothecreatedworkisverydifferentfromtheprovincialandmunicipalstandards.Meanwhile,whenimplementationisnotinplace,generallyonlyfocusonillegalconstructiondemolished,failingthatsplitthatisclear,combineddemolition,insufficientattentiontoreconstructionofoldresidentialareas,urbanvillages,shantytownsandpromotepoor.osolvetheseproblems,wemustenhancethesenseofresponsibilityandurgency,insistonproblem-oriented,totakestrongmeasures,effortstomakeupthe\culture\Board,constructionofcomprehensivesafeguards,\hGateofXXbeautiful\ng.II,andprecisionShipolicy,andmanpowerplayinggood\eagricultural\otracted\cultural\developmenttheworkofbased,countylevelsthesectortoaccordingto\dagricultural,andandmanpowerrural,anddevelopmentfarmers\nsistedagriculturalruralbasedstatusnotshake,insistedhuinongkulakpolicynotweakened,nsistedreforminnovationtestnotstop,effortscreatednewera\cultural\situation.(A)tomakeagriculturemore.Toestablishtheconceptofagriculturearoundthepeopledemand,andcomprehensivelypromotethesupplysideofagriculturestructuralreform,strivetoenhancethequalityandefficiencyofagricultureandcompetitiveness.Focusisondoingthefourarticles.Oneisthesteadyincreaseofgrainarticle.Alwaystightenthestringforfoodsecurity,\bag\nd,toholdlandintheadjustmentofagriculturalplantingstructureinthe\eratingtheconstructionofgrainribbons,improvingagriculturalinfrastructure,enhancefoodproductioncapacity,improvethequalityofagriculturalproducts,effectively\ncreaseofgrain\cond,industryconvergencearticle.Enhancethelevelofconcentration,intensificationofagriculture,creatingproduction,processing,distribution,salesandserviceinoneoftheagriculturalindustrialchain,tobreakdownthevaluechain,improveaddedvalue.Pushingforward\net+agricultural\oimproveagriculturalproduction,management,andservicelevel,innovatingthemodeofe-commercemarketingofagriculturalproducts,solvethedifficultproblemofsalesofagriculturalproducts.Agricultureandtourism,education,culture,health,pensionandotherdeepintegration,developleisure,travellivingstandards,poorfarmersinlessthancompleteeliminationof4600Yuan,8949,19008.\srule\heCountyinvested2.169billionyuan,similarcountieslinethecity'sfirstcompletethe42kmofsewagepipenetworkconstruction,completionraterankedfirstinthecity,wontheprovincialruralsewagetreatmentworkbetter;keypollutionsourcessuchaselectroplating,papermaking,chemicalindustrymanagementthroughverificationandacceptanceofthemunicipalgovernment,theCountyremovedBlackandodorousRiver,Riverwaste,beginningofriverecologicalrestorationeffects.\demolitionillegalareaup2.759millionsquaremeters,completedCityissuedannualtaskof153%,splitagainstarearankingcitysecond;completed\onsquaremeters,completedCityissuedannualtaskof403%,rankingcitythird,whichvillageintheatargetcompletedtotalcityrankingfirst;CountyGovernmentwasnamedcitylevel\nced.Theseachievementsarehardwonandshouldbeappreciated.However,wearefullyaware,thenewperiod,andworkinthecountrysideandtheenvironmentfacinghigherstandardsandrequirements,provincialpartyCommitteeofferedtohighlevelbuildacomprehensivewell-offsocietygoalrequires\nofilth,dirtyenvironmentillegalbuildings,intoawell-off\palpartyCommitteealsoproposestobuildintothewell-offbenchmarkgoalsofthecity.Comparedwiththesuperiorclaim,\ofXXbeautiful\Nong\nvironmentthereareanumberofweaknessesandgaps,highlightedinthefollowingfiveaspects:first,agricultureremained\dinthequalityandlow;short,valueaddedoftheindustrychainislow;123fusionyieldlowemployeeage,lowquality.\nsmaller,specializedcooperativesthroughouttheCountytherewere3,396,butonthescaleoftoolittle.\dinproduction,management,services,decentralized,centralized,standardized,brand,informationandorganizationallevelisnothigh.Second,thecountrysideisstillin\se.\ofruralsanitationsituationhasnotchanged.\nruralhousingconstructionplanning,constructionofdisorder,nodrawings,noconstruction,novetting\nomenon,heaplyingthere.\Bad\base,villagegovernanceispoor.Thirdly,farmerscontinuedtobe\nt\d%urallaborforceaccountedfor70%overtheageof50.\Big\nce,suchasthetransactionsofpropertyrights,landreplacement;publicservicesupplygap,ruraleducation,healthcare,pensionsandotherservicescannotmeetthedemandstilldifficultforpovertyalleviation,withemphasisonpovertyalleviationand191.\d\\peasants.Fourwatereffectsstilllacks

第一單元從試驗(yàn)學(xué)化學(xué)第一節(jié)化學(xué)試驗(yàn)基本方法

一、學(xué)情分析

1.學(xué)生有一定知識(shí)基礎(chǔ)，學(xué)習(xí)較為主動(dòng)，有學(xué)習(xí)動(dòng)機(jī)和興趣，能與教師和同學(xué)進(jìn)行良好的交流與合作，能夠達(dá)到預(yù)定的學(xué)習(xí)目標(biāo)與要求，積極關(guān)注教師創(chuàng)設(shè)的問(wèn)題情景，積極主動(dòng)參與到學(xué)習(xí)活動(dòng)中去，學(xué)生在學(xué)習(xí)活動(dòng)中能提出有意義的問(wèn)題或能發(fā)表個(gè)人見(jiàn)解，能按要求正確操作，能夠傾聽(tīng)、協(xié)作、共享。

2.學(xué)生在初中的學(xué)習(xí)過(guò)程中已經(jīng)接觸到一些試驗(yàn)知識(shí)，本章第一節(jié)的內(nèi)容是對(duì)初中已有的有關(guān)試驗(yàn)知識(shí)的拓寬和提升。初中學(xué)生試驗(yàn)過(guò)程中已經(jīng)涉及一些試驗(yàn)安全問(wèn)題、分開(kāi)的方法。已經(jīng)初步了解了粗鹽提純的方法，蒸餾的簡(jiǎn)易裝置。在本章中要在初中學(xué)習(xí)的基礎(chǔ)上穩(wěn)定粗鹽提純的操作，把握蒸餾的試驗(yàn)室正規(guī)的裝置和規(guī)范的操作，學(xué)習(xí)新的分開(kāi)提純的方法——萃取，還要了解有關(guān)離子的驗(yàn)檢?？梢钥吹降谝还?jié)中學(xué)生學(xué)習(xí)的重點(diǎn)是混合物的分開(kāi)與離子的檢驗(yàn)。在分開(kāi)提純的學(xué)習(xí)過(guò)程中純鹽提純有關(guān)的操作學(xué)生比較熟悉，其學(xué)習(xí)的難度不大。但對(duì)于課本中提到的提純后溶液仍舊存在的雜質(zhì)如何設(shè)計(jì)簡(jiǎn)單的試驗(yàn)進(jìn)行分開(kāi)提純，對(duì)學(xué)生而言涉及物質(zhì)的性質(zhì)，和對(duì)性質(zhì)的靈活應(yīng)用，需要一定分析和規(guī)律思維能力，是學(xué)生學(xué)習(xí)的難點(diǎn)。蒸餾和萃取的試驗(yàn)學(xué)生比較陌生，所以學(xué)習(xí)過(guò)程中也存在一定的困難。

3.學(xué)生尚未形成適合高中學(xué)習(xí)的學(xué)習(xí)方法二、學(xué)習(xí)內(nèi)容分析

（一）化學(xué)課程標(biāo)準(zhǔn)（試驗(yàn)）導(dǎo)航化學(xué)1（必修）主題2化學(xué)試驗(yàn)基礎(chǔ)

1、體驗(yàn)科學(xué)探究的過(guò)程，學(xué)習(xí)運(yùn)用以試驗(yàn)為基礎(chǔ)的實(shí)證研究方法。2、初步學(xué)會(huì)物質(zhì)的檢驗(yàn)、分開(kāi)、提純和溶液的配置等試驗(yàn)技能。3、樹(shù)立安全意識(shí)，能識(shí)別化學(xué)品安全使用標(biāo)識(shí)，初步形成良好的試驗(yàn)工作習(xí)慣。

（二）普通高中高考考綱及高考考試說(shuō)明導(dǎo)航

1、了解化學(xué)試驗(yàn)是科學(xué)摸索過(guò)程中的一種重要方法；

ompelling.\hthe\d,butthefloodofscientificenough,beforethetreatmentandwaterqualityimprovementafterthetreatmenteffectisnotobvious,county-widefocusonriverstilllargelyinferiorfivewater,swimmingtheRivercouldnotbefound.Fiveis\split\sahead.Noticeofstockthere,newconstructiondidnotreceivetimelytreatmenteveryyear(suchasancestralhallasunauthorisedrepeated),contrarytothecreatedworkisverydifferentfromtheprovincialandmunicipalstandards.Meanwhile,whenimplementationisnotinplace,generallyonlyfocusonillegalconstructiondemolished,failingthatsplitthatisclear,combineddemolition,insufficientattentiontoreconstructionofoldresidentialareas,urbanvillages,shantytownsandpromotepoor.osolvetheseproblems,wemustenhancethesenseofresponsibilityandurgency,insistonproblem-oriented,totakestrongmeasures,effortstomakeupthe\culture\Board,constructionofcomprehensivesafeguards,\hGateofXXbeautiful\ng.II,andprecisionShipolicy,andmanpowerplayinggood\eagricultural\otracted\cultural\developmenttheworkofbased,countylevelsthesectortoaccordingto\dagricultural,andandmanpowerrural,anddevelopmentfarmers\nsistedagriculturalruralbasedstatusnotshake,insistedhuinongkulakpolicynotweakened,insistedreforminnovationtestnotstop,effortscreatednewera\cultural\situation.(A)tomakeagriculturemore.Toestablishtheconceptofagriculturearoundthepeopledemand,andcomprehensivelypromotethesupplysideofagriculturestructuralreform,strivetoenhancethequalityandefficiencyofagricultureandcompetitiveness.Focusisondoingthefourarticles.Oneisthesteadyincreaseofgrainarticle.Alwaystightenthestringforfoodsecurity,\bag\nd,toholdlandintheadjustmentofagriculturalplantingstructureinthe\eratingtheconstructionofgrainribbons,improvingagriculturalinfrastructure,enhancefoodproductioncapacity,improvethequalityofagriculturalproducts,effectively\ncreaseofgrain\cond,industryconvergencearticle.Enhancethelevelofconcentration,intensificationofagriculture,creatingproduction,processing,distribution,salesandserviceinoneoftheagriculturalindustrialchain,tobreakdownthevaluechain,improveaddedvalue.Pushingforward\net+agricultural\oimproveagriculturalproduction,management,andservicelevel,innovatingthemodeofe-commercemarketingofagriculturalproducts,solvethedifficultproblemofsalesofagriculturalproducts.Agricultureandtourism,education,culture,health,pensionandotherdeepintegration,developleisure,travellivingstandards,poorfarmersinlessthancompleteeliminationof4600Yuan,8949,19008.\srule\heCountyinvested2.169billionyuan,similarcountieslinethecity'sfirstcompletethe42kmofsewagepipenetworkconstruction,completionraterankedfirstinthecity,wontheprovincialruralsewagetreatmentworkbetter;keypollutionsourcessuchaselectroplating,papermaking,chemicalindustrymanagementthroughverificationandacceptanceofthemunicipalgovernment,theCountyremovedBlackandodorousRiver,Riverwaste,beginningofriverecologicalrestorationeffects.\demolitionillegalareaup2.759millionsquaremeters,completedCityissuedannualtaskof153%,splitagainstarearankingcitysecond;completed\onsquaremeters,completedCityissuedannualtaskof403%,rankingcitythird,whichvillageintheatargetcompletedtotalcityrankingfirst;CountyGovernmentwasnamedcitylevel\nced.Theseachievementsarehardwonandshouldbeappreciated.However,wearefullyaware,thenewperiod,andworkinthecountrysideandtheenvironmentfacinghigherstandardsandrequirements,provincialpartyCommitteeofferedtohighlevelbuildacomprehensivewell-offsocietygoalrequires\nofilth,dirtyenvironmentillegalbuildings,intoawell-off\palpartyCommitteealsoproposestobuildintothewell-offbenchmarkgoalsofthecity.Comparedwiththesuperiorclaim,\ofXXbeautiful\Nong\nvironmentthereareanumberofweaknessesandgaps,highlightedinthefollowingfiveaspects:first,agricultureremained\dinthequalityandlow;short,valueaddedoftheindustrychainislow;123fusionyieldlowemployeeage,lowquality.\nsmaller,specializedcooperativesthroughouttheCountytherewere3,396,butonthescaleoftoolittle.\dinproduction,management,services,decentralized,centralized,standardized,brand,informationandorganizationallevelisnothigh.Second,thecountrysideisstillin\se.\ofruralsanitationsituationhasnotchanged.\isavillageinruralhousingconstructionplanning,constructionofdisorder,nodrawings,noconstruction,novetting\nomenon,heaplyingthere.\Bad\base,villagegovernanceispoor.Thirdly,farmerscontinuedtobe\nt\d%urallaborforceaccountedfor70%overtheageof50.\Big\nce,suchasthetransactionsofpropertyrights,landreplacement;publicservicesupplygap,ruraleducation,healthcare,pensionsandotherservicescannotmeetthedemandstilldifficultforpovertyalleviation,withemphasisonpovertyalleviationand191.\d\\peasants.Fourwatereffectsstilllacks2、了解化學(xué)試驗(yàn)室常用儀器的主要用途和使用方法；

3、把握化學(xué)試驗(yàn)的基本操作，能識(shí)別化學(xué)品安全使用標(biāo)識(shí)。了解試驗(yàn)室一般事故的預(yù)防和處理方法。

4、把握常見(jiàn)氣體的試驗(yàn)室制法（包括所用試劑、儀器，反應(yīng)原理和收集方法）。

5、能對(duì)常見(jiàn)的物質(zhì)進(jìn)行檢驗(yàn)、分開(kāi)和提純。能根據(jù)要求配制溶液。6、能根據(jù)試驗(yàn)試題要求，做到：設(shè)計(jì)、評(píng)價(jià)或改進(jìn)試驗(yàn)方案；了解控制試驗(yàn)條件的方法；分析或處理試驗(yàn)數(shù)據(jù)，得出合理結(jié)論；識(shí)別典型的試驗(yàn)儀器裝置圖。（三）教材內(nèi)容分析

“化學(xué)試驗(yàn)基本方法〞在強(qiáng)調(diào)化學(xué)試驗(yàn)安全性的基礎(chǔ)上，通過(guò)“粗鹽的提純〞試驗(yàn)，復(fù)習(xí)過(guò)濾和蒸發(fā)等操作。蒸餾則是在初中簡(jiǎn)易操作的基礎(chǔ)上引入使用冷凝管這一較正規(guī)的操作。在復(fù)習(xí)拓寬的基礎(chǔ)上又介紹一種新的分開(kāi)和提純方法——萃取。本節(jié)還結(jié)合實(shí)際操作引入物質(zhì)檢驗(yàn)的知識(shí)，這樣由已知到未知，由簡(jiǎn)單到繁雜，逐步深入。

三、教學(xué)目標(biāo)1.知識(shí)與技能目標(biāo)

（1）初步學(xué)會(huì)物質(zhì)的分開(kāi)和提純的常見(jiàn)方法。（2）初步學(xué)會(huì)常見(jiàn)物質(zhì)的檢驗(yàn)方法。（3）能識(shí)別化學(xué)品安全使用標(biāo)識(shí)。

（4）知道基本的安全措施和意外事故的緊急處理方法。2.過(guò)程與方法目標(biāo)

（1）通過(guò)設(shè)計(jì)粗鹽進(jìn)一步提純的試驗(yàn)方案，體驗(yàn)科學(xué)探究的過(guò)程，學(xué)習(xí)運(yùn)用以試驗(yàn)為基礎(chǔ)的實(shí)證研究方法。

（2）通過(guò)物質(zhì)的檢驗(yàn)，混合物的分開(kāi)、提純等試驗(yàn)過(guò)程，學(xué)會(huì)運(yùn)用觀測(cè)、試驗(yàn)、查閱資料等多種手段獲取信息，并運(yùn)用比較、分類、歸納概括等方法對(duì)信息進(jìn)行加工的方法。

（3）通過(guò)分組試驗(yàn)，交流探討，養(yǎng)成實(shí)事求是的科學(xué)素養(yǎng)及合作意識(shí)。3.情感態(tài)度與價(jià)值觀目標(biāo)

（1）通過(guò)識(shí)記一些化學(xué)品安全標(biāo)識(shí)，樹(shù)立安全意識(shí)，形成良好的試驗(yàn)習(xí)慣。

ompelling.\hthe\d,butthefloodofscientificenough,beforethetreatmentandwaterqualityimprovementafterthetreatmenteffectisnotobvious,county-widefocusonriverstilllargelyinferiorfivewater,swimmingtheRivercouldnotbefound.Fiveis\split\sahead.Noticeofstockthere,newconstructiondidnotreceivetimelytreatmenteveryyear(suchasancestralhallasunauthorisedrepeated),contrarytothecreatedworkisverydifferentfromtheprovincialandmunicipalstandards.Meanwhile,whenimplementationisnotinplace,generallyonlyfocusonillegalconstructiondemolished,failingthatsplitthatisclear,combineddemolition,insufficientattentiontoreconstructionofoldresidentialareas,urbanvillages,shantytownsandpromotepoor.osolvetheseproblems,wemustenhancethesenseofresponsibilityandurgency,insistonproblem-oriented,totakestrongmeasures,effortstomakeupthe\culture\Board,constructionofcomprehensivesafeguards,\hGateofXXbeautiful\ng.II,andprecisionShipolicy,andmanpowerplayinggood\eagricultural\otracted\cultural\developmenttheworkofbased,countylevelsthesectortoaccordingto\dagricultural,andandmanpowerrural,anddevelopmentfarmers\nsistedagriculturalruralbasedstatusnotshake,insistedhuinongkulakpolicynotweakened,insistedreforminnovationtestnotstop,effortscreatednewera\cultural\situation.(A)tomakeagriculturemore.Toestablishtheconceptofagriculturearoundthepeopledemand,andcomprehensivelypromotethesupplysideofagriculturestructuralreform,strivetoenhancethequalityandefficiencyofagricultureandcompetitiveness.Focusisondoingthefourarticles.Oneisthesteadyincreaseofgrainarticle.Alwaystightenthestringforfoodsecurity,\bag\nd,toholdlandintheadjustmentofagriculturalplantingstructureinthe\eratingtheconstructionofgrainribbons,improvingagriculturalinfrastructure,enhancefoodproductioncapacity,improvethequalityofagriculturalproducts,effectively\ncreaseofgrain\cond,industryconvergencearticle.Enhancethelevelofconcentration,intensificationofagriculture,creatingproduction,processing,distribution,salesandserviceinoneoftheagriculturalindustrialchain,tobreakdownthevaluechain,improveaddedvalue.Pushingforward\net+agricultural\oimproveagriculturalproduction,management,andservicelevel,innovatingthemodeofe-commercemarketingofagriculturalproducts,solvethedifficultproblemofsalesofagriculturalproducts.Agricultureandtourism,education,culture,health,pensionandotherdeepintegration,developleisure,travellivingstandards,poorfarmersinlessthancompleteeliminationof4600Yuan,8949,19008.\srule\heCountyinvested2.169billionyuan,similarcountieslinethecity'sfirstcompletethe42kmofsewagepipenetworkconstruction,completionraterankedfirstinthecity,wontheprovincialruralsewagetreatmentworkbetter;keypollutionsourcessuchaselectroplating,papermaking,chemicalindustrymanagementthroughverificationandacceptanceofthemunicipalgovernment,theCountyremovedBlackandodorousRiver,Riverwaste,beginningofriverecologicalrestorationeffects.\demolitionillegalareaup2.759millionsquaremeters,completedCityissuedannualtaskof153%,splitagainstarearankingcitysecond;completed\onsquaremeters,completedCityissuedannualtaskof403%,rankingcitythird,whichvillageintheatargetcompletedtotalcityrankingfirst;CountyGovernmentwasnamedcitylevel\nced.Theseachievementsarehardwonandshouldbeappreciated.However,wearefullyaware,thenewperiod,andworkinthecountrysideandtheenvironmentfacinghigherstandardsandrequirements,provincialpartyCommitteeofferedtohighlevelbuildacomprehensivewell-offsocietygoalrequires\nofilth,dirtyenvironmentillegalbuildings,intoawell-off\palpartyCommitteealsoproposestobuildintothewell-offbenchmarkgoalsofthecity.Comparedwiththesuperiorclaim,\ofXXbeautiful\Nong\nvironmentthereareanumberofweaknessesandgaps,highlightedinthefollowingfiveaspects:first,agricultureremained\dinthequalityandlow;short,valueaddedoftheindustrychainislow;123fusionyieldlowemployeeage,lowquality.\nsmaller,specializedcooperativesthroughouttheCountytherewere3,396,butonthescaleoftoolittle.\dinproduction,management,services,decentralized,centralized,standardized,brand,informationandorganizationallevelisnothigh.Second,thecountrysideisstillin\se.\ofruralsanitationsituationhasnotchanged.\nruralhousingconstructionplanning,constructionofdisorder,nodrawings,noconstruction,novetting\nomenon,heaplyingthere.\Bad\base,villagegovernanceispoor.Thirdly,farmerscontinuedtobe\nt\d%urallaborforceaccountedfor70%overtheageof50.\Big\nce,suchasthetransactionsofpropertyrights,landreplacement;publicservicesupplygap,ruraleducation,healthcare,pensionsandotherservicescannotmeetthedemandstilldifficultforpovertyalleviation,withemphasisonpovertyalleviationand191.\d\\peasants.Fourwatereffectsstilllacks（2）通過(guò)學(xué)習(xí)混合物的分開(kāi)操作，了解化學(xué)在生產(chǎn)、生活和科學(xué)研究中的意義及作用，學(xué)會(huì)應(yīng)用所學(xué)知識(shí)解決實(shí)際問(wèn)題。

（3）通過(guò)學(xué)習(xí)廢棄物處理方法，形成關(guān)心環(huán)境、愛(ài)護(hù)環(huán)境的意識(shí)。四、教學(xué)重難點(diǎn)分析

2.教學(xué)重點(diǎn)的分析與確定：

化學(xué)是以試驗(yàn)為基礎(chǔ)的科學(xué)，通過(guò)讓學(xué)生探討一些試驗(yàn)問(wèn)題來(lái)初步體會(huì)化學(xué)研究的方法。初中化學(xué)已經(jīng)介紹了藥品的取用、物質(zhì)的加熱、儀器的洗滌、天平的使用等基本操作，也介紹了過(guò)濾、蒸發(fā)等分開(kāi)操作。本節(jié)選擇粗鹽提純這一涉及基本操作較多的典型試驗(yàn)，復(fù)習(xí)試驗(yàn)原理和步驟，使學(xué)生把握溶解、過(guò)濾、蒸發(fā)、離子檢驗(yàn)等基本操作。進(jìn)而繼續(xù)學(xué)習(xí)蒸餾和萃取等新的分開(kāi)方法，使學(xué)生的試驗(yàn)技能進(jìn)一步提高?；谝陨嫌^點(diǎn)：

教學(xué)重點(diǎn)：混合物的分開(kāi)與離子的檢驗(yàn)，分開(kāi)與提純過(guò)程的簡(jiǎn)單設(shè)計(jì)。3.教學(xué)難點(diǎn)的分析與確定：

從三維目標(biāo)的層面上來(lái)看，把握化學(xué)試驗(yàn)方法是學(xué)習(xí)化學(xué)的重要途徑。能根據(jù)物質(zhì)的性質(zhì)設(shè)計(jì)分開(kāi)和提純的方案，并在初步把握溶解、過(guò)濾的基礎(chǔ)上學(xué)習(xí)蒸餾、萃取的操作，可以由已知到未知，由簡(jiǎn)單到繁雜，逐步深入，并可為選修課《試驗(yàn)化學(xué)》中相關(guān)知識(shí)的學(xué)習(xí)打下良好的基礎(chǔ)?；谝陨嫌^點(diǎn)：

教學(xué)難點(diǎn)：物質(zhì)檢驗(yàn)試劑的選擇，蒸餾、萃取的操作，分開(kāi)與提純過(guò)程的簡(jiǎn)單設(shè)計(jì)。五、教學(xué)方法與手段

教學(xué)方法：掛圖講授與試驗(yàn)相結(jié)合教學(xué)手段：多媒體輔助及試驗(yàn)演示教學(xué)六、教學(xué)用品

1．展示試驗(yàn)安全相關(guān)（1）儀器：坩堝、坩堝鉗等（2）試劑：濃硫酸、燒堿等

（3）教學(xué)設(shè)備：多媒體電腦、投影儀、掛圖2．學(xué)生試驗(yàn)（氯化鈉除雜及離子檢驗(yàn)）

（1）儀器：小燒杯、玻璃棒、漏斗、膠頭滴管、小試管

（2）試劑：NaCl溶液、稀鹽酸、AgNO3溶液、BaCl2溶液、蒸餾水（3）用品：濾紙

ompelling.\hthe\d,butthefloodofscientificenough,beforethetreatmentandwaterqualityimprovementafterthetreatmenteffectisnotobvious,county-widefocusonriverstilllargelyinferiorfivewater,swimmingtheRivercouldnotbefound.Fiveis\split\sahead.Noticeofstockthere,newconstructiondidnotreceivetimelytreatmenteveryyear(suchasancestralhallasunauthorisedrepeated),contrarytothecreatedworkisverydifferentfromtheprovincialandmunicipalstandards.Meanwhile,whenimplementationisnotinplace,generallyonlyfocusonillegalconstructiondemolished,failingthatsplitthatisclear,combineddemolition,insufficientattentiontoreconstructionofoldresidentialareas,urbanvillages,shantytownsandpromotepoor.osolvetheseproblems,wemustenhancethesenseofresponsibilityandurgency,insistonproblem-oriented,totakestrongmeasures,effortstomakeupthe\culture\Board,constructionofcomprehensivesafeguards,\hGateofXXbeautiful\ng.II,andprecisionShipolicy,andmanpowerplayinggood\eagricultural\otracted\cultural\developmenttheworkofbased,countylevelsthesectortoaccordingto\dagricultural,andandmanpowerrural,anddevelopmentfarmers\nsistedagriculturalruralbasedstatusnotshake,insistedhuinongkulakpolicynotweakened,insistedreforminnovationtestnotstop,effortscreatednewera\cultural\situation.(A)tomakeagriculturemore.Toestablishtheconceptofagriculturearoundthepeopledemand,andcomprehensivelypromotethesupplysideofagriculturestructuralreform,strivetoenhancethequalityandefficiencyofagricultureandcompetitiveness.Focusisondoingthefourarticles.Oneisthesteadyincreaseofgrainarticle.Alwaystightenthestringforfoodsecurity,\bag\nd,toholdlandintheadjustmentofagriculturalplantingstructureinthe\eratingtheconstructionofgrainribbons,improvingagriculturalinfrastructure,enhancefoodproductioncapacity,improvethequalityofagriculturalproducts,effectively\ncreaseofgrain\cond,industryconvergencearticle.Enhancethelevelofconcentration,intensificationofagriculture,creatingproduction,processing,distribution,salesandserviceinoneoftheagriculturalindustrialchain,tobreakdownthevaluechain,improveaddedvalue.Pushingforward\net+agricultural\oimproveagriculturalproduction,management,andservicelevel,innovatingthemodeofe-commercemarketingofagriculturalproducts,solvethedifficultproblemofsalesofagriculturalproducts.Agricultureandtourism,education,culture,health,pensionandotherdeepintegration,developleisure,travellivingstandards,poorfarmersinlessthancompleteeliminationof4600Yuan,8949,19008.\srule\heCountyinvested2.169billionyuan,similarcountieslinethecity'sfirstcompletethe42kmofsewagepipenetworkconstruction,completionraterankedfirstinthecity,wontheprovincialruralsewagetreatmentworkbetter;keypollutionsourcessuchaselectroplating,papermaking,chemicalindustrymanagementthroughverificationandacceptanceofthemunicipalgovernment,theCountyremovedBlackandodorousRiver,Riverwaste,beginningofriverecologicalrestorationeffects.\demolitionillegalareaup2.759millionsquaremeters,completedCityissuedannualtaskof153%,splitagainstarearankingcitysecond;completed\onsquaremeters,completedCityissuedannualtaskof403%,rankingcitythird,whichvillageintheatargetcompletedtotalcityrankingfirst;CountyGovernmentwasnamedcitylevel\nced.Theseachievementsarehardwonandshouldbeappreciated.However,wearefullyaware,thenewperiod,andworkinthecountrysideandtheenvironmentfacinghigherstandardsandrequirements,provincialpartyCommitteeofferedtohighlevelbuildacomprehensivewell-offsocietygoalrequires\nofilth,dirtyenvironmentillegalbuildings,intoawell-off\palpartyCommitteealsoproposestobuildintothewell-offbenchmarkgoalsofthecity.Comparedwiththesuperiorclaim,\ofXXbeautiful\Nong\nvironmentthereareanumberofweaknessesandgaps,highlightedinthefollowingfiveaspects:first,agricultureremained\dinthequalityandlow;short,valueaddedoftheindustrychainislow;123fusionyieldlowemployeeage,lowquality.\nsmaller,specializedcooperativesthroughouttheCountytherewere3,396,butonthescaleoftoolittle.\dinproduction,management,services,decentralized,centralized,standardized,brand,informationandorganizationallevelisnothigh.Second,thecountrysideisstillin\se.\ofruralsanitationsituationhasnotchanged.\isavillageinruralhousingconstructionplanning,constructionofdisorder,nodrawings,noconstruction,novetting\nomenon,heaplyingthere.\Bad\base,villagegovernanceispoor.Thirdly,farmerscontinuedtobe\nt\d%urallaborforceaccountedfor70%overtheageof50.\Big\nce,suchasthetransactionsofpropertyrights,landreplacement;publicservicesupplygap,ruraleducation,healthcare,pensionsandotherservicescan