`20 mL` of a weak monobasic acid `(HA)` requires `20 mL 0.2 M NaOH` for complete titration. If `pH`
Channel: Doubtnut
Date: 2020-01-19

`20 mL` of a weak monobasic acid `(HA)` requires `20 mL 0.2 M NaOH` for complete titration. If `pH` of solution upon addition of `10 mL` of this alkali to `25mL` of the above solution of `HA` is `5.8`. The `pK_(a)` of the weak acid is