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Ways to Define Concentration

has a pH va...

Question

___________has a $p H$ value of $13$ .

0.1 M M g C l_{2}

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0.1 M H C l O_{4}

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0.1 M N H_{4} O H

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0.1 M K O H

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0.1 M L i N O_{3}

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Solution

The correct option is D $0.1 M K O H$
$p H = 13 > 7$ or $p O H = 1$
Hence it is false
From the given options, $p O H$ of $0.1$ $M$ $K O H = - log 0.1 = 1$
and hence $p H = 13$
Hence, $0.1$ $M$ $K O H$ is the correct option.
$0.1$ $M$ $N H_{4} O H$ is incorrect because, even if it is a base,
it will have $p H$ different from $13$ as it is a weak base.

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