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The pH of an aqueous solution containing...

The pH of an aqueous solution containing `0.1 M HCI` will be

A

small than `0.1 M H_(2)SO_(4)`

B

smaller than `0.1M` acetic acid solution

C

greater than `0.1M` acetic acid solution

D

equal to `0.1 M` acetic acid solution.

Text Solution

Verified by Experts

The correct Answer is:
B
Acetic acid is a weak acid while both HCI and `H_(2)SO_(4)` are strong acids. But 1 mol `H_(2)SO_(4)` provides 2 mol H ions. Thus, the correct order of `C_(H^(+))` is
`0.1 H_(2)SO_(4) gt 0.1 HCI gt 0.1 M CH_(3)COOH`
pH increases as `C_(H^(+))` decreases. Thus, the correct order of pH is
`pH(CH_(3)COOH)gt pH (HCI)gt pH (H_(2)SO_(4))`
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