How will the `pH` be affected if `1.5L` of `H_(2)O` is added to the above buffer?

Explanation

To determine how the pH of a buffer solution is affected when 1.5 L of water is added, we can follow these steps:

### Step 1: Understand the Buffer System
A buffer solution consists of a weak acid and its conjugate base (or a weak base and its conjugate acid). The pH of a buffer is determined by the ratio of the concentrations of the acid and its conjugate base.

### Step 2: Recall the Henderson-Hasselbalch Equation
For an acidic buffer, the pH can be calculated using the Henderson-Hasselbalch equation:
\[ \text{pH} = \text{pK}_a + \log\left(\frac{[\text{Salt}]}{[\text{Acid}]}\right) \]
...