<u>Answer:</u> The pH of the buffer solution is 3.97
<u>Explanation:</u>
is defined as the negative logarithm of
Mathematically,
We are given:
Putting values in above equation, we get:
The chemical equation for the reaction of benzoic acid (weak acid) and sodium hydroxide (strong base) follows:
To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:
We are given:
= negative logarithm of acid dissociation constant of benzoic acid = 4.19
pH = ?
Putting values in above equation, we get:
Hence, the pH of the buffer solution is 3.97