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1、溶液中离子浓度大小的比较及其规律与应用（ComparisonofionicconcentrationinsolutionanditslawandApplication）ComparisonofionicconcentrationinsolutionanditslawandApplicationIonconcentrationinthesaltsolutioninthehourofjudgmentcanbehydrolyzed,wemustfirstclearthesaltisstronglyionized,hydrolysisisweak,thenclearhydrolysisofpoly
2、basicacidsaltiscarriedoutstepbystep,andthefirststepisthemain,finally,don'tforgettowaterionization.Ionizationandhydrolysisofthetwoprocessestoproduceionsortochangetheconcentrationofions,sothecomparisonoftheconcentrationofionsgenerallyfromthetwoaspectsofthetest.Acommontypeofinequalitybetweenthetestan
3、dtheequalityrelationshipbetweenthetrueorfalsetrueorfalsetwo.Inequalityrelation(1)polybasicweakacidsolutionTheexistenceofH2Ssolutionwithionconcentrationin1.0.1mol/Lsequencefromlargetosmallis__________.Analysis:H2SH++HSinH2Ssolution,HS-H++S2,becausethefirststeptopolybasicionization,thesecondstepisth
4、efirststepofionizationismuchweaker,butthetwostepionizationH+.Answer:C(H+),C(HS),C(S2),C(OH-).Ijudgethegenerallawofionconcentrationinthesolutionisthesizeofthepolybasicacid:(dominantion)>(anion(two)>>(ion)anotherionwaterionizationout)(2)normalsaltsolution,aweakdollar.TheexistenceofCH3COONasolutionwi
5、thionconcentrationin2.0.1mol/Lsequencefromlargetosmallis______.Analysis:inCH3COONasolutionCH3COONa=Na++CH3COO,CH3COOH+H2OCH3COO+Oh-,sothattheC(CH3COO)decreasedandthesolutionisalkaline,C(Na+),C(CH3COO),C(OH-),C(H+).Becausethehydrolysisdegreeofsaltisgenerallysmaller,thereisC(CH3COO-)>C(OH-).Answer:C
6、(Na+),C(CH3COO),C(OH-),C(H+).Ijudgethegenerallawofsaltionconcentrationinthesolutionofweakdollarsizeis:(nothydrolyzedion)>>(hydrolysisions)(dominantion)>(anotherionofionizedwater)(3)twoyuan,normalsaltsolutionofweakacidTheexistenceofNa2CO3solutionwithionconcentrationin3.0.1mol/Lsequencefromlargetosm
7、allis_______.Analysis:inNa2CO3solutionNa2CO3=2Na++CO32,CO32+H2OHCO3+H2OH2CO3+OH-OH-,HCO3+,CO3hydrolysissolutionCountyalkaline,C(OH-),C(H+).BecausetheCO3-lesspartialhydrolysis,C(CO32),C(HCO3),HCO3andsecondstephydr
