Equilibrium Question 296
Question: The solubility product of a binary weak electrolyte is $ 4\times {10^{-10}} $ at $ 298,K $ . Its solubility in mol $ d{m^{-3}} $ at the same temperature is [KCET 2001]
Options:
A) $ 4\times {10^{-5}} $
B) $ 2\times {10^{-5}} $
C) $ 8\times {10^{-10}} $
D) $ 16\times {10^{-20}} $
Show Answer
Answer:
Correct Answer: B
Solution:
AB ⇌ $ {A^{+}}+{B^{-}} $ ; $ K _{sp}=S^{2} $
$ S=\sqrt{K _{sp}}=\sqrt{4\times {10^{-10}}}=2\times {10^{-5}} $
