An acidic buffer solution can be prepared by mixing the solutions of

Options

A. Sodium chloride and sodium hydroxide
B. Nitric acid and sodium nitrate
C. Ammonium chloride and ammonium hydroxide
D. Sodium acetate and acetic acid

Answer

To prepare an acidic buffer solution, we need to mix a weak acid with its corresponding salt. The weak acid will provide the acidic component, while the salt will provide the conjugate base.

### Step-by-Step Solution:

1. **Identify the Components**:
- An acidic buffer is typically made from a weak acid and its conjugate base (salt).

2. **Choose a Weak Acid**:
- Common examples of weak acids include acetic acid (CH₃COOH) and ammonium chloride (NH₄Cl).

3. **Choose the Corresponding Salt**:
- For acetic acid, the corresponding salt is sodium acetate (CH₃COONa).
- For ammonium chloride, the corresponding base is ammonium hydroxide (NH₄OH).

4. **Mixing the Solutions**:
- To prepare the buffer, mix a solution of acetic acid with a solution of sodium acetate.
- Alternatively, mix ammonium chloride with ammonium hydroxide.

5. **Final Buffer Solution**:
- The resulting solution will resist changes in pH when small amounts of acid or base are added, thus functioning as an acidic buffer.

### Conclusion:
An acidic buffer solution can be prepared by mixing acetic acid with sodium acetate or ammonium chloride with ammonium hydroxide.