Equilibrium Question 190

Question: The solubility product of $ BaSO_4 $ is $ 1.5\times {10^{-9}}. $ The precipitation in a 0.01 $ MB{a^{2+}} $ solution will start, on adding $ H_2SO_4 $ of concentration [CPMT 1988]

Options:

A) $ {10^{-9}}M $

B) $ {10^{-8}}M $

C) $ {10^{-7}}M $

D) $ {10^{-6}}M $

Show Answer

Answer:

Correct Answer: C

Solution:

$ K _{sp} $ of $ BaSO_4=1.5\times {10^{-9}} $ ; $ B{a^{++}}=0.01M $

$ SO_4^{-,-}=\frac{1.5\times {10^{-9}}}{0.01}=1.5\times {10^{-7}} $



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