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Question

Calculate the solubility of carbon dioxide in water at 0C and a pressure of 3.0 atm. The solubility of carbon dioxide is 3.48 g/L in water at 0C and 1.00 atm.

A
12.22 g/L
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B
10.44 g/L
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C
5.22 g/L
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D
1.16 g/L
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Solution

The correct option is B 10.44 g/L
The solubility of carbon dioxide gas is proportional to the pressure of the gas above the liquid.
P1=1 atmSolubility,S1=3.48 g/LP2=3 atmS2=?

From Henry's law,
Pgas=KHXgas
where, Xgas=mole fraction of gas in liquid
Pgas is the partial pressure of gas over liquid surface
KH is constant at same temperature
So,
Solubilitypressure

S1S2=P1P23.48 g/LS2=13
S2(solubility at 3 atm) =31×3.48
=10.44 g/L

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