Calculate the degree of ionisation of 0.05 M acetic acid if its `pK_a`, value is 4.74. How is the degree of dissociation affected when its solution also contains
(a) 0.01 M
(b) 0.1 M in HCl ?

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the \( K_a \) from \( pK_a \)

Given:
- \( pK_a = 4.74 \)

Using the formula:
...