Which of the following salt undergoes hydrolysis?

Options

A. `CH_(3)COOK`
B. `NaNO_(3)`
C. `KCI`
D. `K_(2)SO_(4)`

Explanation

To determine which of the given salts undergo hydrolysis, we need to analyze each salt based on the strength of the acids and bases from which they are formed. Hydrolysis occurs in salts derived from weak acids or weak bases. Here’s a step-by-step solution:

### Step 1: Understand Hydrolysis
Hydrolysis of a salt occurs when it reacts with water to produce an acidic or basic solution. This typically happens with salts formed from weak acids or weak bases.

### Step 2: Identify the Nature of Each Salt
We will examine each salt option provided to see if it is derived from a strong acid and a strong base, or from a weak acid or weak base.

1. **CH3COOK (Potassium Acetate)**
- Formed from: CH3COOH (acetic acid, weak acid) + KOH (potassium hydroxide, strong base).
- Since it is formed from a weak acid and a strong base, it will undergo hydrolysis.

2. **NaNO3 (Sodium Nitrate)**
- Formed from: NaOH (sodium hydroxide, strong base) + HNO3 (nitric acid, strong acid).
- This salt is formed from a strong acid and a strong base, so it will not undergo hydrolysis.

3. **KCl (Potassium Chloride)**
- Formed from: KOH (strong base) + HCl (strong acid).
- Like NaNO3, this salt is also formed from a strong acid and a strong base, so it will not undergo hydrolysis.

4. **K2SO4 (Potassium Sulfate)**
- Formed from: KOH (strong base) + H2SO4 (sulfuric acid, strong acid).
- Again, this salt is formed from a strong acid and a strong base, so it will not undergo hydrolysis.

### Step 3: Conclusion
Based on the analysis, the only salt that undergoes hydrolysis is **CH3COOK (Potassium Acetate)**.

### Final Answer
**CH3COOK (Potassium Acetate)** is the salt that undergoes hydrolysis.

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