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Standard XII
Chemistry
Characteristics of Equilibrium Constant
Question

The equilibrium constant for the reaction
CO(g)+H2O(g)⇌CO2(g)+H2(g) at a certain temperature is 2.2. Initially one mole of CO and one mole of H2O are placed in a 2.0L container. What are the concentrations of all the substances when the reaction reached equilibrium?
([CO2]=[H2]=0.2986M,[CO]=[H2O]=0.2014M)

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Solution
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CO(g)+H2O(g)⇌CO2(g)+H2(g)
0.2014 0.2014 0.2986 0.2986 initial
0.2014−x 0.2014−x 0.2986+x 0.2986+x
KC=[2.2986+x]2[0.2014−x]2
2.2=[0.2986+x]2[0.2014−x]2⇒x=10.7

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The equilibrium constant for the reaction
CO(g)+H2O(g)⇌CO2(g)+H2(g) at a certain temperature is 2.2. Initially one mole of CO and one mole of H2O are placed in a 2.0L container. What are the concentrations of all the substances when the reaction reached equilibrium?
([CO2]=[H2]=0.2986M,[CO]=[H2O]=0.2014M)
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