Hydrogen is collected over water at 0.975 atm and 28°C. What is the partial pressure of H2?

1 Answer
anor277
Apr 24, 2018

Well, we need the saturated vapour pressure, PSVP, of water at 301.15⋅K

Explanation:

Pmeasured=Pdihydrogen+PSVP

Pdihydrogen=Pmeasured−PSVP

This site gives PSVP=28⋅mm⋅Hg at 25 ∘C. These data SHOULD have been supplied with the question.

And so..............................

Pdihydrogen=0.975⋅atm−28⋅mm⋅Hg760⋅mm⋅Hg⋅atm−1=0.938⋅atm

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