Chemistry Practice Problems Equilibrium Expressions Practice Problems Solution: The equilibrium constant for the gas phase reactio...

Solution: 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.

Problem

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.

Solution

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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