Asolution which is 10-3 M each in Mn2+, Fe2+,Zn2+ and Hg2+ is treated – InterviewSolution

1.	Asolution which is 10-3 M each in Mn2+, Fe2+,Zn2+ and Hg2+ is treated with 10-16 M sulphideion. If Ksp of MnS, FeS, ZnS and HgS are 10-15, 10-23,10-20 and 10-54 respectively, which one will precipitatefirst?
Answer» A solution which is 10^-3 M each in Mn²⁺, Fe²⁺, Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20 and 10^-54 respectively, which one will precipitate first?

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