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Determine the...

Question

Determine the pH of a solution with a hydroxide ion concentrated of $0.00001$ mole $/$ liter?

- 5

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14

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Solution

The correct option is D $9$
$[O H^{-}] = 0.00001 m o l / L$
$p O H = - l o g [O H] = - l o g 0.00001 = 5$
$p H = 14 - p O H = 14 - 5 = 9$

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