1.

HA is a weak acid. The pH of 0.1 M HA solution is 2. What is the degree of dissociation (alpha) of HA

Answer»

0.5
0.2
0.1
0.301

Solution :`pH = 2, :. [H^(+)] = 10^(-2) = 0.01`.
For weak acid, `[H^(+)] = alpha. C`
or, `0.01 = alpha xx 0.1 rArr alpha = 0.1`.


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