Question

H2 is collected over water at 22 degrees Celsius and 745 torr. What is the partial pressure of the hydrogen if the vapor pressure of water at 22 degrees Celsius is equal to 20.0 torr?

Answer 1

I'm more interested in knowing how to solve this than knowing the answer.

Answer 2

Would it be as simple as 745 torr - 20 torr = 725 torr?

Answer 3

It should be that simple, since they gave you the pressure of the water vapor.

Answer 4

it is that simple. it's based on Dalton's Law of Partial Pressures:\[P_{total} = \Sigma (P_1 + P_2 + ... P_n)\]