Equilibrium Question 484

Question: The pH of $ {10^{-8}} $ molar aqueous solution of $ HCl $ is [CPMT 1988; MNR 1983, 90; MP PMT 1987; IIT 1981; BHU 1995; AFMC 1998; MP PET 1989, 99; BCECE 2005]

Options:

A) $ -8 $

B) 8

C) $ 6>7 $ (Between 6 and 7)

D) $ 7>8 $ (Between 7 and 8)

Show Answer

Answer:

Correct Answer: C

Solution:

As the solution is acidic, pH < 7. This is because $ [{H^{+}}] $ from $ H_2O $

$ [{10^{-7}}] $ cannot be neglected in comparison to $ {10^{-8}} $



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