Equilibrium Question 819

Question: The solubility product of $ Ag_2CrO_4 $ is $ 32\times {10^{-12}} $ . What is the concentration of $ CrO_4^{2-} $ ions in that solution (in g $ {L^{-1}} $ )

Options:

A) $ 2\times {10^{-4}} $

B) $ 8\times {10^{-4}} $

C) $ 8\times {10^{-8}} $

D) $ 16\times {10^{-4}} $

Show Answer

Answer:

Correct Answer: A

Solution:

For ternary electrolyte; solubility $ ={{( \frac{K _{sp}}{4} )}^{\frac{1}{3}}}={{( \frac{32\times {10^{-12}}}{4} )}^{\frac{1}{3}}}=2\times {10^{-4}} $



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