1.

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

Answer»

0.01
0.1
0.5
0.25

Solution :`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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