The pressure exerted by a gas collected by water displacement is obtained by subtracting the vapor pressure of H₂O from the total pressure of the gas collected. This is an example of the application of ________.

Question

Quizplus · Accepted Answer

Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is equal to the sum of the pressures that each gas would exert if it were alone. When collecting gas over water, the total pressure is the sum of the gas pressure and the water vapor pressure. To find the pressure of the gas alone, you subtract the water vapor pressure from the total pressure, applying Dalton's law.

The Pressure Exerted by a Gas Collected by Water Displacement