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pH the Power of H

Determine the...

Question

Determine the pOH of a solution that has $0.00001$ mole of $H_{3} O^{+} /$ liter of solution?

A

2

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B

3

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C

4

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D

5

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E

9

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Solution

The correct option is B $9$
$[H_{3} O^{+}] = 0.00001 m o l / L$
$p H = - l o g [H_{3} O]^{+} = - l o g 0.00001 = 5$
$p O H = 14 - p H = 14 - 5 = 9$

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