Question

“Solubility of salts in water is dependent on temperature” Give the effect of temperature on the

solubility of the following salts.

i) Sodium chloride [1]

ii) Calcium sulphate​

Answer 1

Answer:

For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

Answer 2

I) The temperature dependence of NaCl is fairly flat, meaning that an increase in temperature has relatively little effect on the solubility of NaCl.

II) Calcium sulphate's solubility decreases with an increase in temperature.