Q.

Equilibrium constant for the following equilibrium is given at 00C.Na2HPO4 . 12H2O(s)  ⇌   Na2HPO4 . 7H2O(s)  +  5H2O(g)KP = 31.25 ×  10-13At equilibrium what will be partial pressure of water vapour

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a

15 × 10-3 atm

b

0.5 × 10-3 atm

c

5 × 10-2 atm

d

5 × 10-3 atm

answer is D.

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Detailed Solution

Na2HPO4 . 12H2O(s)  ⇌   Na2HPO4 . 7H2O(s)  +  5H2O(g)KP = 31.25 ×  10-13KP = PH2O5PH2O5 = 31.25 × 10-13PH2O = 31251/5 × 10-151/5PH2O = 5 × 10-3
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Equilibrium constant for the following equilibrium is given at 00C.Na2HPO4 . 12H2O(s)  ⇌   Na2HPO4 . 7H2O(s)  +  5H2O(g)KP = 31.25 ×  10-13At equilibrium what will be partial pressure of water vapour