In the presence of excess of anhydrous SrCl2, the amount of water taken Up is governed by Kp=1012 atm-4 for the following reaction at 273 K SrCl2·2H2O(s)+4H2O(g)⇌SrCl2·6H2O(s) what is equilibrium vapour pressure (in torr) of water in a closed vessel that contains SrCl2·2H2O(s)?

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0.001 torr

103 torr

0.76 torr

1.31 torr

answer is C.

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Detailed Solution

Kp=1PH2O(g)4 ⇒PH2O(g)=1Kp1/4 ⇒ 10-121/4=10-3 atm ∴ Kp=10-3×760=0.76 torr

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