Which of the following salts undergoes hydrolysis ?

Options

A. `CH_3COONa`
B. `KNO_3`
C. `NaCI`
D. `K_2SO_4`

Answer

To determine which of the given salts undergoes hydrolysis, we need to analyze the nature of each salt based on the acids and bases from which they are derived. Hydrolysis of salts occurs when the salt is formed from a weak acid and/or a weak base. Here’s a step-by-step solution:

### Step 1: Understand Hydrolysis of Salts
Hydrolysis of a salt occurs when it reacts with water to produce an acidic or basic solution. The tendency of a salt to undergo hydrolysis depends on the strength of the acid and base from which it is formed.

### Step 2: Identify the Nature of Each Salt
1. **Sodium Acetate (CH₃COONa)**:
- Formed from acetic acid (weak acid) and sodium hydroxide (strong base).
- Will undergo hydrolysis.

2. **Potassium Nitrate (KNO₃)**:
- Formed from nitric acid (strong acid) and potassium hydroxide (strong base).
- Will not undergo hydrolysis.

3. **Sodium Chloride (NaCl)**:
- Formed from hydrochloric acid (strong acid) and sodium hydroxide (strong base).
- Will not undergo hydrolysis.

4. **Potassium Sulfate (K₂SO₄)**:
- Formed from sulfuric acid (strong acid) and potassium hydroxide (strong base).
- Will not undergo hydrolysis.

### Step 3: Conclusion
Among the salts listed, only sodium acetate (CH₃COONa) is formed from a weak acid (acetic acid) and a strong base (sodium hydroxide), which means it will undergo hydrolysis.

### Final Answer
The salt that undergoes hydrolysis is **Sodium Acetate (CH₃COONa)**.

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