How will you separate a mixture of two solids which differ in their solubilities in the same solvent ?

Answer

To separate a mixture of two solids that differ in their solubilities in the same solvent, you can follow these steps:

### Step-by-Step Solution:

1. **Identify the Solids**: Determine the two solids in the mixture and their solubility characteristics. For example, let's consider a mixture of sand (which is insoluble in water) and common salt (sodium chloride, which is soluble in water).

2. **Add Solvent**: Take the mixture of the two solids and add a suitable solvent (in this case, water) to it.

3. **Dissolve the Soluble Solid**: Stir the mixture thoroughly. The soluble solid (common salt) will dissolve in the water, while the insoluble solid (sand) will remain undissolved.

4. **Filtration**: Use a filter paper and funnel to filter the mixture. The sand will be left on the filter paper as residue, while the salt solution will pass through into the beaker below.

5. **Evaporate the Solvent**: To obtain the solid salt, heat the salt solution to evaporate the water. This can be done using a gentle heat source. As the water evaporates, the salt will start to crystallize.

6. **Collect the Crystals**: Once all the water has evaporated, you will be left with solid salt crystals. You can scrape these off from the container.

7. **Final Separation**: You now have two separate components: sand (which remains on the filter paper) and salt (which has crystallized from the solution).

### Summary:
By using the method of fractional crystallization, you can effectively separate two solids based on their differing solubilities in a solvent.

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