Preparing a Saturated Solution of Common Salt

Homogeneous Mixtures: A solution is a homogeneous mixture of two or more substances. A solution has a solvent and a solute as its components. The component of the solution that dissolves the other component in it (usually the component present in larger amounts) is called the solvent. The component of the solution that is dissolved in the solvent (usually present in lesser quantity) is called the solute. 

Example: A solution of salt in water.

Saturated solution of common salt in water: A saturated solution is one in which no more solute can be dissolved in the solvent at a given temperature. 

As the temperature of the solvent increases, the solvent is capable of dissolving more solute. 

The aim of this experiment is to prepare a saturated solution of common salt in distilled water. 

The apparatus and chemicals required for this experiment are 2 beakers of 100 mL capacity, 2 magnetic stirrer/ glass rods, Common salt, Hot distilled water, Distilled water at room temperature and 2 spatulas

Procedure

The procedure followed in this experiment is as follows: 

1. In two separate 100 mL beakers, take the same amount of distilled water.
2. One beaker should contain water at room temperature, and the second should contain hot water. 
3. Keep adding small amounts of salt using the spatula equally to both beakers with constant stirring.
4. Do this until a little amount of salt remains at the bottom. 
5. Observe the number of spatulas of salt added for water at room temperature and for hot water. 

Conclusion

Hence, we can conclude that:

• A solution comprises a solute and a solvent.
• A saturated salt solution is obtained when no more solute dissolves in the solvent.
• 13 spatulas of salt were required to make a saturated solution with water at 25 ?, and 14 spatulas of salt were required for hot water.
• Therefore, solubility increases as the temperature increases.

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