Question

For a sparingly soluble salt ApBq, the relationship of its solubility product Kₛp with its solubility S is:

• A. \(K_{sp}=S^p(p)^p\,S^q(q)^q\)
• B. \(K_{sp}=Sp+q\)
• C. \(K_{sp}=Sp+q\,p^q\)
• D. Kₛp=Sᵖpᵖ qq

Hint:

For a salt ApBq: Kₛp=(pS)ᵖ(qS)q Always raise concentrations to their stoichiometric powers.

Answer 1

The Correct Option is A

Step 1: Dissociation of salt: ApBq(s)rightleftharpoons pAq++qBᵖ-
Step 2: If solubility is S: [Aq+]=pS, [Bᵖ-]=qS
Step 3: Solubility product: Kₛp=(pS)ᵖ(qS)q