Answer to Question #198734 in General Chemistry for jessica

Question #198734
  1. Oxygen gas was collected over water in a gas collection tube.  What is the pressure of "wet" oxygen gas (this means dry oxygen gas and water vapour) if 0.8 mol of dry oxygen gas, with a partial pressure of 101.3 kPa, was collected over water at a temperature of 15.0°C?
  2. Solid magnesium was added to a gas collection tube containing hydrochloric acid and water. Gas was collected by displacing the water in the tube.  After the experiment, the total pressure in the tube was equalized with the atmospheric pressure, which was 114 kPa.  The temperature of the water was 35°C.  What was the partial pressure of the dry hydrogen gas?

Expert's answer

1.Pressure of "wet" oxygen gas=53.6 kPa

2.Partial pressure of the dry hydrogen gas=34kPa

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