Write the reaction and simplified Ksp expression (algebraic expression) for the dissociation of:

Question

a) Silver Chromate

b) calcium sulfate

c) lead(II) chloride

d) iron(II) phosphate

Answer 1

a) Ag₂CrO₄(s) <==> 2Ag⁺(aq) + CrO₄^2-(aq); Ksp = [Ag⁺]²[CrO₄^2-] = (2x)²(x) = 4x³

b) CaSO₄(s) <==> Ca²⁺(aq) + SO₄^2-(aq); Ksp = [Ca²⁺][SO₄^2-] = x²

c) PbCl₂(s) <==> Pb²⁺(aq) + 2Cl^-(aq); Ksp = [Pb²⁺][Cl^-]² = (x)(2x)² = 4x³

d) Fe₃(PO₄)₂(s) <==> 3Fe²⁺(aq) + 2PO₄^3-(aq); Ksp = (1.5x)³(x)² = 3.375x⁵