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What is the correct order of solubility of NiS, CuS and ZnS in aqueous medium?

What is the correct order of solubility of NiS, CuS and ZnS in aqueous medium?

Grade:11

1 Answers

Arun
25750 Points
5 years ago
Sodium salts are highly soluble. Cu^2+ belongs to the II^nd group in salt analysis and is precipitated as CuS, whereas Zn^2+ belongs to the IV group and is precipitated as ZnS after CuS because of higher K base sp of ZnS.
 
Hence 
Na2S > ZnS > Cus

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