Question

the pH of 0.043 m formic acid is 4.37 calculate its ionisation constant
plz answer​

Answer 1

Answer:

HCOOH+H

2

O→H

3

O

+

+HC

−

C

C(1−α) Cα Cα

K

a

=

c(1−α)

cα.cα

=

1−α

2

cα

2

α=14.5%=0.145

K

a

=

1−0.145

0.01(0.145)

2

K

a

=2.1×10

−4