Question

equivalent conductance of saturated BaSO4 is 400

Answer 1

Given,
equivalent conductance = 400 Ω⁻¹ cm² eqvt⁻¹
conductance = 8 × 10⁻⁵ Ω⁻¹ cm⁻¹

we know,
$\bold{S}=\bold{\frac{\Lambda\times1000}{\Lambda_{eq}}}$
Where $\Lambda$ is conductance
$\Lambda_{eq}$ is equivalent conductance

So, S = 4 × 10⁻⁵ × 1000/400 = 10⁻⁴

Now, BaSO₄ ⇔ Ba²⁺ + SO₄²⁻
Ksp = [Ba²⁺] [SO₄²⁻] = S² = 10⁻⁴ × 10⁻⁴ = 10⁻⁸ M²

Hence, Ksp value is 10⁻⁸ M² , option (B) is correct answer