What is the relationship between the solubility in water, s,And K_s_p for the ionic solid Ca₃(PO₄)₂?

Question

Quizplus · Accepted Answer

The solubility product (Ksp) for Ca3(PO4)2 involves the dissolution of the solid into its ions: Ca3(PO4)2(s) ⇌ 3Ca2+(aq) + 2PO4^3-(aq). If s is the solubility in mol/L, then [Ca2+] = 3s and [PO4^3-] = 2s. Plugging these into the expression for Ksp gives Ksp = [Ca2+]^3[PO4^3-]^2 = (3s)^3(2s)^2 = 27s^3 * 4s^2 = 108s^5, which matches the form of choice A.

What Is the Relationship Between the Solubility in Water, S,And