Question

The solubility constant of MnS is 2.3 ×10−13 at 25°C. What is the concentration of sulfide
ions in a saturated solution of MnS at equilibrium?

Answer 1

[A] + [B] ⇌ [C] + [D]

MnS ⇌ Mg + S

Ksp = [C][D]

Ksp = (Mn)(S)

2.3*10^-13 = (x)(x)

2.3*10^-13 = x^2

x = 4.8*10^-7

Concentration of sulfide is x.

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