A sample of chlorine gas is collected by water displacement at 23°C. If the atmospheric pressure is 751 torr, what is the partial pressure of the chlorine?

1 Answer
anor277
May 9, 2016

A gas collected over water, is saturated with respect to water vapour, which must be taken into account.

Explanation:

#P_("collected")# #=# #P_(Gas) + P_(H_2O)#

#P_(H_2O)~=20*mm*Hg# at #20# #""^@C#.

So #P_(Gas)# #=# #731*mm*Hg#

#"SVP"#, #"the saturated vapour pressure"# is tabulated for a range of temperatures, and values should have been included in the question.

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