1.

A solution of weak acid HA containing 0.01 moles of acid per litre of solutions has pH = 4. The percentage degree of ionisation of the acid and the ionisation constant of acid are respectively

Answer»

`1%, 10^(-6)`
`0.01%, 10^(-4)`
`1%, 10^(-4)`
`0.01%, 10^(-6)`

SOLUTION :`H^(+) = C ALPHA`
`alpha = (H^(+))/(C) = (10^(-4))/(10^(2)) = 10^(-6)`.


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