Problem: For the reaction shown here:2H2O(g)  ⇌ 2H2(g)+O2(g)the equilibrium concentrations were found to be:[H2O]=0.250 M[H2]=0.560 M[O2]=0.800 MWhat is the equilibrium constant for this reaction?Keq =?  

FREE Expert Solution

We’re asked to determine the equilibrium constant, Keq for the given reaction:


2H2O(g)  2H2 (g) + O2 (g)


Recall that the equilibrium constant is the ratio of the products and reactants


We use Kp when dealing with pressure and Kc when dealing with concentration:


Kp=PproductsPreactants     Kc=[products][reactants]


Note that solid and liquid compounds are ignored in the equilibrium expression.


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Problem Details

For the reaction shown here:
2H2O(g)  ⇌ 2H2(g)+O2(g)

the equilibrium concentrations were found to be:

[H2O]=0.250 M
[H2]=0.560 M
[O2]=0.800 M

What is the equilibrium constant for this reaction?
Keq =?

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