必岛他 College of Chemistry Chemical Engineering Analytical Chemistry分析化学 例1:AgBr在20m0L1NH溶液中的溶解度? 解: AgBr(s)与Ag+Br NH3 Ag(NH3) aA=aANH=1+∑NHNH]≈cmn=20moL aapH=1+∑NH3r=10763 K =K A [Ag=s, [ Br ]=5 S=[Ag=Br] /KaA=√50×1013×10765=47×10-3moL haplY Gravier 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 例1：AgBr在2.0 mol 2.0 mol 2.0 mol 2.0 mol⋅L-1 NH3溶液中的溶解度？ 溶液中的溶解度？ 溶液中的溶解度？ 溶液中的溶解度？ [Ag '] , [Br ] s s − = = Ag Ag(NH ) 3 3 1 [NH ] i α α β = = +∑ i 3 NH3 [NH ] 2.0 mol/L ≈ = c 3 7.65 Ag Ag(NH ) 3 1 [NH ] 10 i α α β = = + = ∑ i sp s K [Ag '] [Br ] ' − = = = 13 7.65 3 sp Ag K α 5.0 10 10 4.7 10 mol/L − − = = × × = × Br α =1 解： AgBr(s) �Ag+ + Br￾NH3 Ag(NH3) i sp sp Ag K K ' = α