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?

Question

anonymous · Answer

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

anonymous · Answer

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

ipwnbunnies · Answer

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

jfraser · Answer

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