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1、第三单元盐类的水解教(学)案（Thirdunitsalthydrolysisteaching(learning)case）Thirdunitsalthydrolysisteaching(learning)caseHydrolysisofsalts[learninggoal]1..Understandingthephenomenaandessenceofhydrolysisofsalts,andexplainingthehydrolysisofstrongbases,weakacids,saltsandstrongacidsandweakbases.2.canusetheruleo
2、fhydrolysisofsalttojudgetheacidityandbasicityofsaltsolution,andcanwritetheionicequationofsalthydrolysis.[studyemphasis]theessenceofhydrolysisofsalts[learningdifficulty]hydrolysisofsalthydrolysisequation[reviewintroduction]1,acidshavestrongacidsandweakacids,andbaseshavestrongbasesandweakbases.
3、Whatkindsofsaltscanbeformedbetweenthem?Compositionofsalt:acid+base=Salt+waterStrongacid,alkali,strongacid,alkalisalt,suchas:NaCl,Strongacid,weakbase,salt,NH4Cl,Weakacid,weakbase,weakacid,alkalisalt,CH3COONa,Weakacid,weakbasesalt,CH3COONH4,2.Thesolutionisacidic,thealkalinesolutionisalkaline,an
4、dthesaltsolutionmustbeneutral?[activityandinquiry,]P79Theacidityandalkalinityofthesaltsolutionproducesthesaltsofacidsandbases,thetypesofsalts,sodiumchloride,sodiumcarbonate,sodiumacetate,ammoniumchloride,aluminumchloride[discussion],1.CH3OONasolutionsarealkaline,andwhy?CH3OONa=CH3OO-+Na++h++o
5、h-,h2och3cooh①总的化学方程式②总的离子方程式③溶液中_____(有或无)弱电解质(化学式:)生成,水的电离平衡_________(被破坏或不受影响),并向方向移动,因而(促进、抑制)了水的电离.c(h+)c(oh-)(填"＞"＜"或"＝"),呈性.【讨论】2.nh4cl溶液显酸性,为什么?①总的化学方程式②总的离子方程式③溶液中_____(有或无)弱电解质(化学式:)生成,水的电离平衡__________(被破坏或不受影响),并向方向移动,因而(促进、抑制)了水的电离.c(h+)c(oh-)(填"＞"＜"或"＝"),呈性.【讨论】3.nacl溶液中性,为什么?溶液中
6、_____(有或无)弱电解质(化学式生成,:)Theionizationequilibrium__________water(destroyedorunaffected),C(H+)C(OH)(fillin">"<"or"="),was.[discussion]whatistherelationshipbetweenthetypeof4.saltandtheacidityandbasicityofthesolution?TherelationshipbetweenpHandsaltsolutionofsaltcomposition:Theaqueoussolutionofstro
7、ngalkaliandweakacidshowedC(H+)C(OH-)TheaqueoussolutionofstrongacidandweakbasesaltshowedC(H+)C(OH-)Theaqueoussolutionofstrongacid,strongalkaliandsaltshowedC(H+)C(OH-)Sumup:HydrolysisofsaltsConcept:2.theessenceofhydrolysis:destructionofwater(io
