Partial Pressure Practice Problems
1. A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00
atm, and 4.00 atm, respectively. What is the total pressure inside the container?
2. Dry air contains oxygen, nitrogen, carbon dioxide and trace amounts of other gasses. What is the partial pressure of oxygen (O2) in
a mixture with a total pressure of 101.3 kPa if the partial pressures of nitrogen, carbon dioxide and other gasses are 79.10 kPa, 0.040
kPa, and 0.94 kPa respectively.
3. A mixture of oxygen, hydrogen and nitrogen gases exerts a total pressure of 278.00 kPa. If the partial pressures of the oxygen and
the hydrogen are 112.00 kPa and 101.00 kPa respectively, what would be the partial pressure exerted by the nitrogen.
4. A mixture of neon and argon gases exerts a total pressure of 2.39 atm. The partial pressure of the neon alone is 1.84 atm, what is
the partial pressure of the argon?
5. Determine the total pressure of a gas mixture that contains oxygen, nitrogen, and helium if the partial pressures of the gases are:
O2 = 20.2 kPa, N2 = 46.7 kPa and He = 26.7 kPa.
6. What’s the partial pressure of carbon dioxide in a container that holds 5.00 moles of carbon dioxide, 3.00 moles of nitrogen, and
1.00 mole of hydrogen and has a total pressure of 1.05 atm?
7. A tank contains 160.0 grams of oxygen (O2) and 40.00 grams of helium (He) at a pressure of 100. kPa. What are the partial
pressures of each of the two gases?
8. A tank contains 480.0 grams of oxygen (O2) and 80.00 grams of helium (He) at a total pressure of 7.00 atmospheres. Calculate the
partial pressures of oxygen and helium.
9. A mixture of H2 (1.01 g) and Cl2 (17.73 g) in a container at 27°C has a total gas pressure of 98.8 kPa. What is the partial pressure of
hydrogen in the mixture?
10. A mixture of H2 (4.04 g) and O2 (32.0 g) in a container at 27°C has a total gas pressure of 0.906 atmosphere. What is the partial
pressure of hydrogen in the mixture?
11. If 60.0 L of nitrogen is collected over water at 40.0 °C which results in a total pressure of 760.0 mm Hg, what is the partial
pressure of the nitrogen?
12. A sample of hydrogen gas is collected over water at 14.0°C. The pressure of the resultant mixture is 113.0 kPa. What is the
pressure that is exerted by the dry hydrogen alone?
13. A 450 cm3 sample of hydrogen is collect over water at 12.0°C. The pressure of the hydrogen and water vapor mixture is 78.5
kPa. What is the partial pressure of the dry hydrogen gas?
14. 888 cm3 of oxygen are collected over water with a temperature of 25.0°C. The total pressure of the gases is 55.8 kPa. What is
the partial pressure of the dry gas?
Temp (oC)
Water
Vapor
Pressure
(mmHg)
Water
Vapor
Pressure
(kPa)
Temp (oC)
Water
Vapor
Pressure
(mmHg)
Water
Vapor
Pressure
(kPa)
-10
2.15
0.29
37
47.07
6.27
0
4.58
0.61
40
55.3
7.37
5
6.54
0.87
60
149.4
19.91
10
9.21
1.23
80
355.1
47.33
11
9.84
1.31
95
634
84.50
12
10.52
1.40
96
658
87.70
13
11.23
1.50
97
682
90.90
14
11.99
1.60
98
707
94.24
15
12.79
1.70
99
733
97.70
20
17.54
2.34
100
760
101.30
21
18.68
2.49
101
788
105.03
25
23.76
3.17
110
1074.6
143.23
27
26.78
3.57
120
1489
198.47
30
31.8
4.24
200
11659
1554
Answers (in random order):
0.55 0.583 0.604 3.00 4.00 9.00 33.3 21.22 49.4 52.6 65 66.7 77.1 93.6 111 705
atm atm atm atm atm atm kPa kPa kPa kPa kPa kPa kPa kPa kPa mm Hg