Gas mixtures and partial pressures | AP Chemistry | Khan Academy

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For a mixture of ideal gases, the total pressure exerted by the mixture equals the sum of the pressures that each gas would exert on its own. This observation, known as Dalton's law of partial pressures, can be written as follows: P(total) = P₁ + P₂ + P₃ + ... where P₁, P₂, and P₃ are the partial pressures of the different gases in the mixture, and P(total) is the total pressure of the mixture. View more lessons or practice this subject at https://www.khanacademy.org/science/a...

Sections:
00:00 - Introduction to partial pressure
00:36 - Total pressure as sum of partial pressures
01:18 - Using ideal gas law for partial pressures
02:14 - Factoring pressure equation for multiple gases
03:37 - Applying mole values to partial pressure
04:20 - Calculating mole fraction
05:34 - Using mole fraction to find partial pressure
06:14 - Final result: partial pressure of gas three

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