Question

Question No. 136
K, for a weak monobasic acid HA is 1 x 10-4. Neutralisation constant for the reaction of HA with KOH
(A) 10-10
(B) 10-14
(C) 104
(D) 1010​

Answer 1

Answer:

Weak monobasic acid and salt of weak acid and strong base will form a acidic buffer.

So pH=pK

a

+log

[Acid]

[Salt]

If weak monobasic acid is half neutralised so [Acid]=[Salt]

pH=pK

a

=5.4