Question

the pH of a buffer solution containing equal concentration of weak monobasic acid and salt is 5.0 . what is its pKb?

Answer 1

Explanation:

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