Chemistry, asked by kalyani2210, 9 months ago

An acidic buffer solution containing 0.04M H-COOH and H-COONa has PH 4. Calculate the concentration of H-COONa. Ka for H-COONa =1.78*10^-4​

Answers

Answered by ritamriyu12
1

Answer:

HOPE IT HELPS.

Explanation:

In this case, the pH of the solution will be equal to the acid's

p

K

a

. Now, if you have more conjugate base than weak acid, like you have here, you would expect the log term to return a positive value.

This means that the pH will actually increase, which is what you should expect to see in this case.

pH

=

p

K

a

+

log

(

[

HCOO

]

[

HCOOH

]

)

pH

=

3

,

.75

+

log

(

0.50

M

0.27

M

)

pH

=

3.75

+

0.268

=

4.02

Indeed, the pH of the buffer is higher than the

p

K

a

of the acid.

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