Understanding the Properties
* Solubility: Nitre is more soluble in hot water than common salt.
* Crystallization: Nitre forms crystals more easily than common salt upon cooling.
The Separation Process
1. Dissolving: Heat the mixture of nitre and common salt in a minimum amount of water until both substances dissolve. You may need to add water gradually.
2. Cooling: Allow the solution to cool slowly. As it cools, the solubility of nitre decreases, causing it to crystallize out of the solution.
3. Filtration: Use a filter paper to separate the nitre crystals from the remaining solution.
4. Washing: Wash the nitre crystals with a small amount of cold water to remove any remaining salt. The cold water minimizes the loss of nitre.
5. Drying: Allow the nitre crystals to dry completely.
Optional: Obtaining the Common Salt
* Evaporation: Carefully evaporate the remaining solution to obtain the common salt. This will likely yield a mixture of salt and some remaining nitre.
Important Notes:
* Caution: Always handle chemicals with care, especially when using heat.
* Purity: This method provides a good separation but might not yield perfectly pure nitre or salt. Further purification techniques might be necessary for certain applications.
Let me know if you'd like more details on any step!
