Brock+Dalton's

Dalton's Law-States that the total pressure of a gas mixture is the sum of the partial pressures of the component gases.

The equation is: P T = P ı + P 2 + P 3 ... P T = total pressures P ı, P 2 , P 3 ... = partial pressures

Example problem: If there is 500 mm Hg of pressure in a container with two substances in it and hydrogen takes up 300 mm Hg of the pressure, how much of the second substance, oxygen, will there be?

Plug your numbers into the equation:

500= 300 + P2

Then we must isolate P2, by subtracting 300 from both sides.

P2= 200 mm Hg of pressure Home Page