Equilibrium Question 322

Question: A 0.1N solution of an acid at room temperature has a degree of ionisation 0.1. The concentration of $ O{H^{-}} $ would be [MH CET 1999]

Options:

A) $ {10^{-12}}M $

B) $ {10^{-11}}M $

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

D) $ {10^{-2}}M $

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Answer:

Correct Answer: A

Solution:

$ [{H^{+}}]=C\times \alpha =0.1\times 0.1={10^{-2}}M $ pH = 2; pOH = 12 ; $ [O{H^{-}}]={10^{-12}}M $ .



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