Chemical And Ionic Equilibrium Result Question 19

19. For a sparingly soluble salt $A _p B _q$, the relationship of its solubility product $\left(L _s\right)$ with its solubility $(S)$ is

(2001, 1M)

(a) $L _s \quad S^{p+q} p^p q^q$

(b) $L _s \quad S^{p+q} p^q q^p$

(c) $L _s \quad S^{p q} p^p q^q$

(d) $L _s \quad S^{p q}(p \cdot q)^{(p q)}$

Show Answer

Answer:

Correct Answer: 19. ( a )

Solution:

  1. $A_p B_q \rightleftharpoons \underset{p S}{p A}+\underset{q S}{q B}$

$K_{\mathrm{sp}}=(p S)^p(q S)^q=S^{(p+q)} \cdot p^p \cdot q^q$

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