A gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of 32.9kPa. If Po2 = 6.6kPa and Pn2=23.0 kPa, what is Pco2?

The partial pressure of the carbon dioxide is 3,3 kPa.

Explanation:

We apply Dalton's law, according to which the sum of the partial pressures of the gases that make up a gaseous mixture is equal to the total pressure of this:

Ptotal = P N2 + P C02 + P 02

32, 9 kPa = 23, 0 kPa + P C02 + 6, 6Kpa

P C02 = 32, 9 kPa - 23, 0 kPa - 6, 6Kpa = 3, 3 kPa