Homework Help: Chemistry Lab

Posted by Heather on Monday, October 15, 2012 at 10:16pm.

Hydrogen gas was collected over water in a eudiometer at 26 degrees celcius when the atmospheric pressure was 756 mm Hg. What was the pressure of the H2 gas?

Chemistry Lab - DrBob222, Monday, October 15, 2012 at 10:30pm
Note the correct Hpelling of celsius.
Ptotal = pH2O + pH2
Ptotal = 756 mm Hg.
pH2O = vapor pressure of H2O at 26 C. Look up the vapor pressure of H2O at that T, then substitute and solve for pH2.
Chemistry Lab - Heather, Monday, October 15, 2012 at 10:57pm
thank you so much for your help!

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