例:25C,已知K(Ag2CrO4)=11×10-12,求 同温下S(Ag2CrO4)gL1 解: Ag2 CrO4 (s)=2Ag(aq)+ Cro4(aq) 平衡浓度/(molL) 2x X ∥ke(AgCO)=限)}(e(CO2 1×1012=4x3x=6.5×1035 會M( Ag 2 cro1)=3317 S=65×10×3317gL=22×102gL/(mol L ) 2 1 x x - 平衡浓度 Mr (Ag 2CrO4 ) = 331.7 5 1 2 1 6.5 10 331.7g L 2.2 10 g L - - - - s = × × = × 12 3 5 1.1 10 4 , 6.5 10 - × - × = x x = 例:25oC,已知 (Ag2CrO4)=1.1×10-12 ,求 同温下s(Ag2CrO4)/g·L-1 。 Ksp Ag CrO (s) 2Ag (aq) CrO (aq) 2 4 4 + 2- + 2 4 2 2 4 (Ag CrO ) { (Ag )} { (CrO )} + - K = c c sp 解: