Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium.

Question

Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium. (A)  CuS > ZnS > Na2 S  (B) ZnS > Na2S > CuS  (C)  Na2S > CuS > ZnS  (D)  Na2S > ZnS > CuS

Tardigrade Admin · Accepted Answer

Alkali metal salts are usually more soluble than the salts of transition metals. Also, CuS is less soluble than ZnS because of 3d9 configuration of Cu 2 + . Therefore, solubility order is Na2S > ZnS > CuS

Q. Identify the correct order of solubility of $N a_{2} S, C u S$ and $Z n S$ in aqueous medium.

$C u S > Z n S > N a_{2} S$

$Z n S > N a_{2} S > C u S$

$N a_{2} S > C u S > Z n S$

$N a_{2} S > Z n S > C u S$

Alkali metal salts are usually more soluble than the salts of transition metals. Also, $C u S$ is less soluble than $Z n S$ because of $3 d^{9}$ configuration of $C u^{2 +}$ . Therefore, solubility order is $N a_{2} S > Z n S > C u S$

Q. Identify the correct order of solubility of Na2​S,CuS and ZnS in aqueous medium.

CuS>ZnS>Na2​S

ZnS>Na2​S>CuS

Na2​S>CuS>ZnS

Na2​S>ZnS>CuS