Question

Hydrogen gas is collected over water at a total pressure of 95.0kPa. The volume of gas collected is 28.0mL at 25.0˚C. Determine the partial pressure of the hydrogen gas if the water vapor pressure is 3.17kPa.

GAS LAW:

Given:

Unknown:

Formula:

Solution:

Answer 1

Dalton's Law

P tot = P H₂O + P gas

95.0 = 3.17 + P gas

P gas = 91.83 kPa