Question

Calcualte pH of a salt of weak monobasic acid and
weak monoacidic base having concentration 0.1M
at 25°C (Given :- pk = 4.8, pk, = 5.2)​

Answer 1

Answer : The pH of a salt of weak monobasic acid and  weak monoacidic base is 6.8

Explanation :

The formula used for weak monobasic acid and  weak monoacidic base of pH is:

$pH=\frac{1}{2}[pK_w+pK_a-pK_b]$

where,

$pK_w$ = dissociation constant of water = 14

$pK_a$ = dissociation constant of weak acid = 4.8

$pK_b$ = dissociation constant of weak base = 5.2

Now put all the given values in the above formula, we get:

$pH=\frac{1}{2}\times [14+4.8-5.2]$

$pH=6.8$

Therefore, the pH of a salt of weak monobasic acid and  weak monoacidic base is 6.8

Answer 2

The pH of the salt of weak monobasic acid and weak monoacidic base having concentration 0.1 M at 25 degree centigrade is 6.8 .

HOPE IT HELPS YOU