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Question

NaOH is a strong base. What will be the pH of 5.0×102M NaOH solution?
(log 2=0.3)

A
14.00
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B
13.70
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C
13.00
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D
12.70
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Solution

The correct option is C 12.70
Given that,
5.0×102M NaOH[OH]=5×102M

[H+][OH]=1×1014

[H+]×5×102=1×1014

[H+]=1×10145×102=2×1013

pH=log[H+]=log(2×1013)

=12.6912.70.

Option D is correct.

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