MCQ
Given a $0.1\,M$ solution of each of the following. Which solution has the lowest $pH$
- A$NaHS{O_4}$
- B$N{H_4}Cl$
- ✓$HCl$
- D$N{H_3}$
✓
Answer
Correct option: C.
$HCl$
(c) Because it is a strong acid.
${H^ + } = {10^{ - 1}}$
$pH = - \log \,\,[{H^ + }]$ $ = - \log \,\,[{10^{ - 1}}]$; $pH = 1$.
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