Question

Determine the molar solubility of pbso4 in pure water. ksp (pbso4) = 1.82 x 10-8.

a. 1.82 x 10-8 m

b. 1.35 x 10-4 m

Answer 1

Use the ICE table approach as solution:

PbSO₄ --> Pb²⁺ + SO₄²⁻
I - 0 0
C - +s +s
E - s s

Ksp = [Pb²⁺][SO₄²⁻]
1.82×10⁻⁸ = s²
Solving for s,
s = 1.35×10⁻⁴ M