计算400ml0.50mol•L Na2S2O3溶液可溶解多少克固体AgBr?
问题描述:
计算400ml0.50mol•L Na2S2O3溶液可溶解多少克固体AgBr?
答
AgBr + 2S2O32- =[Ag(S2O3)2]3- + Br-K=KspAgBr * K稳定=5.0*10^-13*10^13.46=14.42AgBr + 2S2O32- =[Ag(S2O3)2]3- + Br-0.5-2x x xK=x*x /(0.5-2x)^2 =14.42x=0.22mol/L溶解固体n(AgBr)=n(Br-)=0.22mol/L*0.400L=0....