Can Fe2+ and Mn2+ be separated by precipitating FeS(s) and not MnS(s)? Assume [Fe2+]=[Mn2+]=[H2S]=0.10 M. Choose a [H3O+] that ensures maximum precipitation of FeS(s) but not MnS(s). Will the separation be complete? For FeS, Kspa = 6x10^2 ; for MnS, Kspa = 3x10^7

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  1. What does Kspa mean? It can't be Ksp because neither Ksp for FeS nor Ksp for MnS are anywhere close to these values you list.

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