MCQ
What is the $pH$ value of $M\, H_2SO_4$ ?
- A$0$
- B$-0.213$
- C$-2$
- ✓$-0.3010$
✓
Answer
Correct option: D.
$-0.3010$
d
$\mathop {{H_2}S{O_4}}\limits_{1\,M} \to \mathop {2{H^ + }}\limits_{2\,M} + \mathop {SO_4^{2 - }}\limits_{1\,M} $
$\mathop {{H_2}S{O_4}}\limits_{1\,M} \to \mathop {2{H^ + }}\limits_{2\,M} + \mathop {SO_4^{2 - }}\limits_{1\,M} $
$[{H^ + }] = 2$
$pH = - \log [{H^ + }] = - \log \,2$
$ = - 0.3010\,\,\,[\because \,\log \,2 = 0.3010]$
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