You collect a sample of hydrogen gas in an inverted buret by displacement of water at 24.8oC. The water level in the buret was 15.89 cm above the water level in the water bath. The volume of the gas in the buret was determined to be 32.20 mL. If the current atmospheric pressure was 29.68" of Hg, what is the pressure of the dry hydrogen in the buret in atm

The pressure of the dry hydrogen is 0.011 atm

Explanation:

Given:

Water level in the buret = 15.89 cm

Temperature = 24.8°C

Volume of the gas = 32.2 mL

Atmospheric pressure = 29.68 mmHg = 0.039 atm

Question: What is the pressure of the dry hydrogen in the buret, PH₂ = ?

We need to know the pressure of the water vapor, in this case, we will assume a value of 21.3 torr = 0.028 atm

The pressure of the dry hydrogen is the difference of the total atmospheric pressure and water vapor pressure:

pie chart because it is in percents ( % )