The pH of a solution is 5. To this solution acid was added so that its pH value be comes 2.0. The increase in H' concentration is :

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100 times

5 times

2.5 times

1000 times

answer is D.

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Detailed Solution

pH=-log10H+original pH=5Original [H+]=10−pH=10−5 M New pH=2 New [H+]=10−pH=10−2 MThe increase in [H+]=10−5 M10−2 M−10−5 M=9.99×102≃1000 times

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