Partial Pressure Calculator

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Partial pressure calculatoris very useful tool for evaluatingPartial pressure of individual gases in a mixture of gases in a container. This tool uses Dalton’s Partial pressure Law and formulas. It states total pressure is the sum of individual pressure of each gas in the mixture. The partial pressure of each gas is the mole fraction of the total pressure.

Example 1:-

Find the Partial pressureof hydrogen(1.01g) and chlorine(17.73g) in its mixture having total

pressure 98.8kPa:-

Solution 1:- Moles of Hydrogen = 1.02/2.02 = 0.500 mol

Moles of Chlorine gas = 17.73/70.90 = 0.250 mol

Partial pressure of H2 = 0.500/0.750 x 98.8 = 65.9 kPa

Partial pressure of Cl2 = 0.250/0.750 x 98.8 = 32.9 kPa

Answer : Hydrogen gas = 65.9 kPa  and Chlorine gas = 32.9 kPa

Example 2:-

Find the Partial pressureof hydrogen(4.04g) and oxygen(32.0g) in its mixture having total

pressure 0.906 kPa:-

Solution 2:- Moles of Hydrogen = 4.04 / 2.02 = 2.0 mol

Moles of Oxygen gas = 32.0 / 32.0 = 1.0 mol

Partial pressure of H2 = 2.0 / 3.0 x 0.906 = 0.667 kPa

Partial pressure of O2 = 1.0 / 3.0 x 0.906 = 0.302 kPa

Answer : Hydrogen gas = 0.667 kPa and Oxygen gas = 0.302 kPa