Problem: The equilibrium constant for the gas phase reaction2 NH3 (g) ⇌ N2 (g) + 3 H2 (g)is Ke= 2.30 x 10-5 at 300 °C. Which one of the statements is true at equilibrium?a) The reactant predominates.b) The products predominate.c) Only products are present.d) Only the reactant is present.

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We're being asked to identify which of the given statements is true at equilibrium for the following reaction:

2 NH3 (g) ⇌ N2 (g) + 3 H2 (g)         Ke = 2.30 x 10-5 at 300 °C


K is the equilibrium expression of the concentrations in the reaction. The general form of an equilibrium expression is:

K=productsreactants

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Problem Details

The equilibrium constant for the gas phase reaction

2 NH3 (g) ⇌ N2 (g) + 3 H2 (g)

is Ke= 2.30 x 10-5 at 300 °C. Which one of the statements is true at equilibrium?

a) The reactant predominates.

b) The products predominate.

c) Only products are present.

d) Only the reactant is present.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Equilibrium Expressions concept. If you need more Equilibrium Expressions practice, you can also practice Equilibrium Expressions practice problems.