Leena and her sister wanted to prepare a 50 ml saturated solution of common salt in water in order to prepare mango pickle. After adding sufficient salt and water and stirring it, they found some salt remaining undissolved in the solution. Which of the following methods can be used to completely dissolve the salt?

Leena and her sister wanted to prepare a 50 ml saturated solution of common salt in water in order to prepare mango pickle. After adding sufficient salt and water and stirring it, they found some salt remaining undissolved in the solution. Which of the following methods can be used to completely dissolve the salt? Correct Answer Increasing the temperature of the solution by 5°C to 10°C

Factors Affecting Solubility of a Solute in a Solvent:

• Nature of solute and Solvent: Polar solute like sodium chloride dissolves in a polar solvent like water. Non-Polar solutes like cholesterol, bromine, etc dissolve in a non-polar solvent like Benzene, carbon
• tetrachloride (CCl4).
• Effect of Temperature: Usually, the solubility of a solute increases with an increase in the temperature of the solution, but the solubility of some substances such as calcium nitrate, and calcium oxide decreases with an increase in temperature.
• Effect of Pressure: Pressure has no effect on the solubility of solids in liquid. But solubility of gases in liquids increases with the increase in pressure.
• Size of Substance: Solubility decreases as the molecular mass of a substance increases.
   

Conclusion: As solubility increases with an increase in temperature. Hence, Increasing the temperature of the solution by 5°C to 10°C can be used to completely dissolve the salt.