Equilibrium Question 888

Question: The pH of solution, containing 0.1 N HCI and $ 0.1,N,CH_3COOH,(K_{a}=2\times {10^{-5}}) $ is

Options:

A) 1

B) 0.7

C) 3

D) 1.3

Show Answer

Answer:

Correct Answer: D

Solution:

Dissociation of acetic acid $ (CH{ _3}COOH) $ will be very less so $ {H^{+}} $ from $ HCl $ . $ PH=-{{\log }^{({H^{+}})}}=-\log ({10^{-1}})=1. $



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