The aqueous solution of aluminium chloride is acidic due to the

Options

A. cationic hydrolysis
B. aniomic hydrolysis
C. dissociationn
D. hydrolysis of both cation and anion

Answer

To solve the question, "The aqueous solution of aluminium chloride is acidic due to the," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Aluminium Chloride**:
Aluminium chloride (AlCl₃) is an ionic compound that, when dissolved in water, dissociates into aluminium ions (Al³⁺) and chloride ions (Cl⁻).

2. **Hydrolysis of Aluminium Ions**:
The aluminium ion (Al³⁺) is a small, highly charged cation. When it is in an aqueous solution, it tends to react with water molecules. This reaction is known as hydrolysis. The hydrolysis of Al³⁺ can be represented as follows:
\[ \text{Al}^{3+} + 3 \text{H}_2\text{O} \rightleftharpoons \text{Al(OH)}_3 + 3 \text{H}^+ \]
In this reaction, aluminium ions react with water to form aluminium hydroxide (Al(OH)₃) and release hydrogen ions (H⁺) into the solution.

3. **Formation of Hydrogen Ions**:
The release of H⁺ ions into the solution is what makes the solution acidic. The presence of these hydrogen ions decreases the pH of the solution, making it acidic.

4. **Conclusion**:
Therefore, the aqueous solution of aluminium chloride is acidic due to the hydrolysis of aluminium ions, which leads to the formation of hydrogen ions.

### Final Answer:
The aqueous solution of aluminium chloride is acidic due to cationic hydrolysis, which results in the release of hydrogen ions (H⁺) into the solution.

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