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Question

CO (g) is dissolved in H2O at 25oC and 0.010 atm. Henry's law constant for this system is 5.80×104 atm. Thus, mole fraction of CO (g) is

A
8.28×107
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B
0.01
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C
0.99
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D
1.72×107
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Solution

The correct option is D 1.72×107
The mole fraction of a gas in solution is related to partial pressure of the gas above the solution by Henry's law.
pCO=χCOKH
χCO=pCOKH=0.01 atm5.8×104 atm
=1.72×107

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