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必岛他 College of Chemistry Chemical Engineering Analytical Chemistry分析化学 MA Ks=MJA IMJA K M A IMJA= KSDOMMA=Ks S=M+ ML+ MLl+.+M(OH)I+IM(OH)2]=MT s=[A]+HA]H+[H2A]++[HA]=[A MA=K甲=M=A1=√K甲=√k ad 若>,有沉淀生成; M]A]">?k 甲若<,无沉淀生成。 haplY Gravimet 2013-2014Analytical Chemistry Analytical Chemistry Analytical Chemistry Analytical Chemistry 分析化学 ChapⅨ Gravimetry Gravimetry Gravimetry Gravimetry 2013-2014 2013-2014 2013-2014 2013-2014学年 sp sp M A M A [M'][A'] ' [M][A] K K α α α α = = = sp M A sp [M '][A '] ' = = K K α α MA s = [M] + [ML] + [ML = [M] + [ML] + [ML = [M] + [ML] + [ML = [M] + [ML] + [ML2]+…+[M(OH)]+[M(OH) +[M(OH)]+[M(OH) +[M(OH)]+[M(OH) +[M(OH)]+[M(OH) 2] =[M´] s = [A]+[HA]+[H = [A]+[HA]+[H = [A]+[HA]+[H = [A]+[HA]+[H2A]+…+[HnA] =[A´] sp s K = = = [M '] [A '] ' = Ksp M A α α MmAn ( ) ' m n sp m n K s m n + = ( ) sp M A m n m n m n K m n α α + = sp [M'] [A'] ?K' m n > 若 > ,有沉淀生成; ,有沉淀生成; ,有沉淀生成; ,有沉淀生成; 若 < ,无沉淀生成。 ,无沉淀生成。 ,无沉淀生成。 ,无沉淀生成。 sp [M '][A '] ' = K
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