Question

A sparingly soluble salt MX is dissolved in water to prepare 1 lit. saturated solution. Now 10^-6 mol NaX is added into this. Conductivity of this solution is 29 x  10 ^-6 S/m. If K_SP of MX is a x 10^-b then find value of (a + b)?

Given  λ_x-⁰ =  4 x 10^-3 S m² mol^- 

λ⁰_Na+ = 5 x 10^-3 S m² mol^- 

λ⁰_M⁺ = 6 x 0^-3 S m² mol^- 

Answer 1

x = 2 x 10^-6

K_SP = 6 x 10^-12