Question

0.01M solutions of a monobasic acid dissociates to the extent of 10%.calclate the dissociation constant of the acid.

Answer 1

Explanation:

HA⇌H

+

+A

−

According to ostwald's dilution law for weak monobasic acid

K

a

=Cα

2

It is given that K

a

=4.0×10

−10

,C=0.01

So, α=

C

K

a

=2×10

−4

.

Concentration of Hydrogen ion =Cα=2×10

−6

mol/l