What is the pH of 10^ -8 M HCl solution?

MHT CET 2024 Chemistry question

What is the pH of M HCl solution?

(1)8
(2)7
(3)< 7Correct
(4)> 8

Answer: (3)

Solution

HCl is a strong acid, but at such a low concentration the from the ionisation of water ( M) cannot be neglected. Total , with and , which gives M. So H^+$}] ≈

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Question ID VK-095648