Problem: For the reaction2 H2O(g) ⇌ 2 H2(g) + O2(g)The equilibrium concentrations were found to be:[H2O] = 0.250M[H2] = 0.300M[O2] = 0.750 MWhat is the equilibrium constant for this reaction?

FREE Expert Solution

We’re being asked to determine the equilibrium constant for this reaction:

2 H2O(g) ⇌ 2 H2(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

2 H2O(g) ⇌ 2 H2(g) + O2(g)

The equilibrium concentrations were found to be:

[H2O] = 0.250M

[H2] = 0.300M

[O2] = 0.750 M

What is the equilibrium constant for this reaction?

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