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The pH of a 0.1 M aqueous solution of a ...

The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?

A

0.01

B

0.1

C

0.5

D

0.25

Text Solution

Verified by Experts

The correct Answer is:
A
`HA hArr H^(+)+A^(-)`,
`[H^(+)]=c alpha = 10^(-3) " " (. :' pH=3)`
i.e., `0.1xx alpha = 10^(-3) "or" alpha=10^(-2)=1%`
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