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

Question

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

DrBob222 · Answer

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.