What will be nature of charge on colloidal particie when `FeCl_(3)` is added to excess of hot water ?

Options

A. Positive
B. Negative
C. Neutral
D. Some times positive and some times negative

Answer

To determine the nature of the charge on colloidal particles when FeCl₃ is added to excess hot water, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Reaction**: When FeCl₃ is dissolved in hot water, it dissociates into its ions. The dissociation can be represented as:
\[ \text{FeCl}_3 \rightarrow \text{Fe}^{3+} + 3\text{Cl}^- \]

2. **Formation of Colloidal Particles**: The Fe³⁺ ions react with water to form hydrated ferric oxide, which can be represented as:
\[ \text{Fe}^{3+} + \text{H}_2\text{O} \rightarrow \text{Fe}_2\text{O}_3 \cdot x\text{H}_2\text{O} \]
This hydrated ferric oxide is a colloidal particle.

3. **Charge on Colloidal Particles**: The hydrated ferric oxide formed from Fe³⁺ ions will carry a positive charge. This is because the Fe³⁺ ions are cations, and when they aggregate to form the colloidal particles, they retain this positive charge.

4. **Conclusion**: Therefore, the nature of the charge on the colloidal particles formed when FeCl₃ is added to excess hot water is **positively charged**.

### Final Answer:
The nature of the charge on colloidal particles when FeCl₃ is added to excess hot water is **positively charged**.