Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.

Explanation

To separate two compounds with different solubilities in a solvent S, we can use the method of fractional crystallization. Here’s a step-by-step explanation of the process:

### Step-by-Step Solution:

1. **Preparation of the Mixture**:
- Take the mixture of the two compounds in powdered form and add it to a flask containing the solvent S.

2. **Dissolution**:
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