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Question

The following data has been given for solubility of CO2 in H2O

TemperatureHenry's constantPressure273 K600 atm0.03 atm333 K3400 atmp2

If solution of CO2 in H2O is heated from 273 to 333 K, pressure (P2) need to keep CO2 in the solution is

A
0.108 atm
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B
0.17 atm
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C
0.212 atm
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D
0.468 atm
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Solution

The correct option is B 0.17 atm
By Heny's law at 273 K,

χCO2(molefractionofCO2)=pKH=0.030600

By Henry's law at 333 K, χCO2=pKH=p23400

p23400=0.03600

p2=0.030×3400600=0.17atm
Hence, (b) is correct.

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