By which method preciptate is converted into colloids ?

Answer

To convert a precipitate into a colloidal solution, the method used is called **peptization**. Here’s a step-by-step explanation of the process:

### Step-by-Step Solution:

1. **Understanding Precipitate and Colloids**:
- A precipitate is a solid that forms from a solution during a chemical reaction.
- A colloidal solution consists of small particles dispersed throughout a medium, which do not settle out over time.

2. **Definition of Peptization**:
- Peptization is defined as the process of converting a precipitate into a colloidal solution.

3. **Requirements for Peptization**:
- To achieve peptization, you need two main components:
- A **dispersion medium** (this can be water or any other suitable solvent).
- A **peptizing agent** (which is usually a small electrolyte).

4. **Process of Peptization**:
- **Step 1**: Start with the precipitate that you want to convert.
- **Step 2**: Add the dispersion medium to the precipitate. This medium helps to disperse the particles.
- **Step 3**: Introduce the peptizing agent (electrolyte) into the mixture. The electrolyte will interact with the precipitate.

5. **Charge Generation**:
- The peptizing agent will attach to the surface of the precipitate particles, leading to the generation of charges on them.
- These charges create a repulsive force between the particles, preventing them from aggregating back into a solid.

6. **Formation of Colloidal Solution**:
- As a result of the repulsive forces, the particles remain dispersed in the medium, forming a colloidal solution.

7. **Result**:
- You now have a colloidal solution, which contains charged particles that can move freely in the dispersion medium.

### Summary:
The method by which a precipitate is converted into colloids is known as **peptization**, which involves shaking the precipitate with a dispersion medium in the presence of a peptizing agent (electrolyte).

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