A weak monobasic acid HA is 1% ionised in a 0.1 M solution. Taking K_a = calpha^2, the value of K_a is

NEET levelSingle correct optionDifficulty 1 of 3ie006

A weak monobasic acid HA is $1%$ ionised in a $0.1 M$ solution. Taking $K_{a} = c α^{2}$ , the value of $K_{a}$ is

K_{a} = c α^{2} = 0.1 \times (0.01)^{2} = 1 e - 05

. Using

c α

instead gives

[H X^{+}]

, not

K_{a}