Question

For which condition, the solubility of gas in solvent at a given temperature increases?

• A. On increasing the pressure of the gas.
• B. On decreasing the pressure of the gas.
• C. Can be increased by both decreasing and increasing pressure of the gas.
• D. Solubulity of a gas can be increased by increasing temperature only.

Answer 1

The correct option is A On increasing the pressure of the gas.

When the gas is in equilibrium with the liquid solution,

$\text{Rate of dissolution of gas}=\text{Rate of escape of gas from the liquid}$

When the pressure of the gas is increased, population density of the ​gas molecules increases and the equilibrium between gas and liquid ​gets disturbed​ and to restore the equilibrium more gas molecules enter into the solution phase which leads to increase in solubility of gas.