The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?
The pH of a 0.1 M aqueous solution of a weak acid (HA) is 3. What is its degree of dissociation ?
A. `10%`
B. `25%`
C. `50%`
D. None of these
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Correct Answer - D
`HA hArr H^(+)+A^(-)`
`[H^(+)]=calpha=10^(-3)`
As` c=0.1 M implies 0.1 alpha=10^(-3)`
or `alpha=10^(=-2)` or `% alpha =1%`
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