MCQ
$pH$ of a solution is $ 4.$ The hydroxide ion concentration of the solution would be
- A${10^{ - 4}}$
- ✓${10^{ - 10}}$
- C${10^{ - 2}}$
- D${10^{ - 12}}$
✓
Answer
Correct option: B.
${10^{ - 10}}$
(b) $pH$ $ = 4$
$pH + pOH = 14$ ; $pOH = 14 - pH$
$pOH = 14 - 4 = 10$; $[O{H^ - }] = {10^{ - 10}}\,M$
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