1. Tardigrade
  2. Question
  3. Chemistry
  4. If the salts M2X , QY2 and PZ3 have the same solubilities, their Ksp values are related as

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. If the salts $ M_2X $ , $ QY_2 $ and $ PZ_3 $ have the same solubilities, their $ K_{sp} $ values are related as

AMUAMU 2011Equilibrium

Solution:

For $M_2 - X $;
$M_2X \rightleftharpoons 2M^+ + X^{2-}$
$\therefore K_{sp} = (2s)^2 \times s$
$ = 4s^2$
For $QY_2$;
$QY_2 \rightleftharpoons Q^{2+} + 2Y^-$
$\therefore K_{sp} = s \times (2s)^2 = 4s^2$
For $PZ_3$;
$PZ_3 \rightleftharpoons P^3 + 3Z^-$
$\therefore K_{sp} = s \times (3s)^3 = 27 s^4$
Thus, $K_{sp}$ is in order,
$K_{sp}(M_2X) = K_{sp} (QY_2) < K_{sp}(PZ_3)$