The figure shows oxygen gas being bubbled through water and collected above the

Question

The figure shows oxygen gas being bubbled through water and collected above the water, along with some water vapor. Answer the following questions about the collected gas sample based on a laboratory temperature of 50.0°C and the molecular-level image of the collected gas o2 H,O Part 1: (a) Use a table of vapor pressure of water at various temperatures to determine the partial pressure of water vapor, PH,o- 2.5 torr Part 2 out of 5 (b) Calculate the partial pressure of oxygen, Po, using the ratio of the H2O and O2 gases in the molecular-level image and Dalton's law of partial pressures. torr 2 attempts left Check my work Next part

Explanation / Answer

You've got partial pressure of water = 92.5 torr

According to dalton's law

PA = P x YA

PA = partial pressure of any gas A

P = total presure of gas

YA = mole fraction of gas A

PH2O = P x YH2O

YH2O = molecules of H2O / total molecules = 1/6 obtained from figure

92.5 torr = P x 1/6

P =92.5 x 6 torr = 555 torr

Partial pressure of oxygen

PO2 = P x YO2 = 555 torr x (1-1/6) = 462.5 torr

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