William Henry made systematic studies of the solubility of a gas in a liquid. He gave a quantitative relationship between the solubility of a gas in a solvent and pressure which is known as Henry’s law. The law states that- the mass of a gas dissolved per unit volume of the solvent at a constant temperature is directly proportional to the pressure of the gas in equilibrium with the solution.

If m is the mass of the gas dissolved in a unit volume of the solvent and p is the pressure of the gas in equilibrium with the solution, then

\[m \propto p\]

\[or,  m = K.p\]

where K is the proportionality constant. The magnitude of K depends on the nature of the gas, the nature of the solvent, the temperature and the units of pressure. Thus, Henry’s law may also be stated as: the solubility of a gas in a liquid at a particular temperature is directly proportional to the pressure of the gas in equilibrium with the solution.

Henry's law constant is dependent on which of the following factors?

All of the above

The answer is 4. All of the above.

The value of Henry's law constant of a gas is dependent on the following factors:

The nature of the solvent: The solvent-solute interactions affect the solubility of a gas in a liquid. Solvents with stronger intermolecular forces will have higher Henry's law constants for gases that have similar intermolecular forces.

The nature of the gas: The gas-solvent interactions also affect the solubility of a gas in a liquid. Gases with stronger intermolecular forces will have higher Henry's law constants for solvents with similar intermolecular forces.

Temperature: The temperature of the system affects the solubility of a gas in a liquid. As the temperature increases, the solubility of a gas in a liquid decreases. This is because the kinetic energy of the gas molecules increases, which makes it more likely for them to escape from the liquid.

Pressure: The pressure of the system affects the solubility of a gas in a liquid. As the pressure of a gas increases, the solubility of the gas in a liquid increases. This is because the increased pressure forces more gas molecules into the liquid.

Therefore, the value of Henry's law constant of a gas is dependent on all of the factors listed above.