Which will undergo cationic hydrolysis ?

Options

A. NaCI
B. `CH_3COONa`
C. `(NH_4)_2SO_4`
D. `Na_2CO_3`

Answer

To determine which of the given salts will undergo cationic hydrolysis, we will analyze each option based on the nature of the acid and base from which they are derived.

### Step-by-Step Solution:

1. **Identify the salts and their components**:
- **NaCl**: Derived from HCl (strong acid) and NaOH (strong base).
- **Sodium acetate (CH3COONa)**: Derived from acetic acid (weak acid) and NaOH (strong base).
- **Ammonium sulfate ((NH4)2SO4)**: Derived from sulfuric acid (strong acid) and ammonium hydroxide (weak base).
- **Sodium carbonate (Na2CO3)**: Derived from carbonic acid (weak acid) and NaOH (strong base).

2. **Analyze NaCl**:
- **Components**: Strong acid (HCl) and strong base (NaOH).
- **Conjugate acids and bases**: Both Na+ (from NaOH) and Cl- (from HCl) are weak and do not undergo hydrolysis.
- **Conclusion**: No hydrolysis occurs.

3. **Analyze Sodium Acetate (CH3COONa)**:
- **Components**: Weak acid (acetic acid) and strong base (NaOH).
- **Conjugate base**: CH3COO- (from acetic acid) is strong, and Na+ is weak.
- **Conclusion**: This will undergo anionic hydrolysis, not cationic hydrolysis.

4. **Analyze Ammonium Sulfate ((NH4)2SO4)**:
- **Components**: Strong acid (sulfuric acid) and weak base (ammonium hydroxide).
- **Conjugate acid**: NH4+ (from ammonium hydroxide) is strong, and SO4^2- is weak.
- **Conclusion**: This will undergo cationic hydrolysis because NH4+ can donate a proton (H+).

5. **Analyze Sodium Carbonate (Na2CO3)**:
- **Components**: Weak acid (carbonic acid) and strong base (NaOH).
- **Conjugate base**: CO3^2- (from carbonic acid) is strong, and Na+ is weak.
- **Conclusion**: This will undergo anionic hydrolysis, not cationic hydrolysis.

### Final Conclusion:
The only salt that undergoes cationic hydrolysis is **Ammonium Sulfate ((NH4)2SO4)**.

### Answer:
**Ammonium Sulfate ((NH4)2SO4)** will undergo cationic hydrolysis.

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