The solubility of a gas in water which is exposed to the atmosphere, when the partial pressure is 700 mm is 1.4×10−4M. What is the solubility of the gas at 760 mm and at same temperature?
A
2.5×10−2M
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B
4.1×10−4M
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C
1500M
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D
1.52×10−4M
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Solution
The correct option is D1.52×10−4M From Henry's law, Pgas=KHXgas
where, Xgas=mole fraction of gas in liquid Pgas is the partial pressure of gas over liquid surface
According to Henry's Law:
So,
Solubility∝pressure
S1S2=P1P2⇒1.4×10−4S2=700760 ⇒S2(solubility at 760 mm) =760700×1.4×10−4 =1.52×10−4M