MCQ
At ${90\,^o}C$ pure water has $[{H_3}{O^ + }] = {10^{ - 6}}\,M,$ the value of ${K_w}$ at this temperature will be
- A${10^{ - 6}}$
- ✓${10^{ - 12}}$
- C${10^{ - 14}}$
- D${10^{ - 8}}$
✓
Answer
Correct option: B.
${10^{ - 12}}$
(b) For pure water $[{H^ + }] = [O{H^ - }]$,
$\therefore \,{K_w} = {10^{ - 12}}$ $s$
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