Question

A sample of oxygen gas was collected by displacement of water in gas collection apparatus. The total pressure in the collection vessel was 732.7 torr, the temperature was 26.0 C, and the vessel contained 522 ml of the collected gas. At 26 C, the vapor pressure of water is 22.6 torr. What is the partial pressure (in torr) of oxygen gas? Keep answer with 1 decimal place

Answer 1

Step-by-step explanation:

The sample of oxygen gas was collcted over water. That mean that it has some vwater vapor oin it. According to Dalton's Law, the total pressure will be the sum of the parti l pressur of the oxuygen gas and the partial pressure of the water vapor.

Ptotal = Pvapor + Poxygen

We alreay know the total pressure and th vaor pressure a t the temperature that we are working. We can relace hthose values in thee formula and solve it for the partial pressure of the oxygen gas to get the answer to our problem.

total = Pvapor + Poxygen

732.7 torr = 22.6 torr + Poxygen

Poxygen = 732.7 torr - 22.6 torr

Poxygen = 710.1 torr

Answer: the partial pressure of the oxyge gas is 710.1 torr