Chemical and Ionic Equilibrium 2 Question 19

19. For a sparingly soluble salt ApBq, the relationship of its solubility product (LS) with its solubility (S) is

(2001,1M)

(a) Ls=Sp+qppqq

(b) Ls=Sp+qpqqp

(c) LS=Spqppqq

(d) Ls=Spq(pq)(p+q)

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Solution:

  1. ApBqpApS+qBqS

Ksp=(pS)p(qS)q=S(p+q)ppqq