Question

Calculate the ratio of ph of 1 mole of ch3coona+1 mole of hcl and other solution contain 1 mole of ch3coona +1mole of ch3cooh is

Answer 1

Answer:

Correct option is

C

1:2

For CH

3

COONa+HCl→CH

3

COOH+NaCl

[CH

3

COOH]=1M

[H

+

]=

K

a

C

=

K

a

pH

1

=−

2

1

logK

a

Since it is a buffer,

CH

3

COONa+CH

3

COOH

PH

2

=−logK

a

+log

1

1

=−logK

a

pH

2

pH

1

=

2

1

Hence ratio is 1:2