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pH the Power of H

A given weak ...

Question

A given weak acid (0.01M ) has $p K_{a} = 6.$ the pH of the solution is :

A

3

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B

4

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C

5

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D

6

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Solution

The correct option is B 4
Given, $[weak acid] = 0.01 M$ , $p K_{a} = 6.$
pH of weak acid is given by
$p H = \frac{1}{2} p K_{a} - \frac{1}{2} log C$
$p H = \frac{1}{2} \times 6 - \frac{1}{2} log (0.01) = 3 + 1 = 4.$

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pH the Power of H

Standard XII Chemistry

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