In a chemical reaction 4mol of Nitrogen monoxide NO and 2.5mol of Oxygen O2 are mixed together in a container with a volume of 1000ml to produce Nitrogen Dioxide NO2. If equilibrium constant Kc for this reaction is 0.001.

1. Write a balanced chemical equation for the above reaction?

2. Determine the equilibrium concentration for each substances?

1 answer

1. The balanced chemical equation for the reaction is:

2NO(g) + O2(g) -> 2NO2(g)

2. Let x be the amount of NO and O2 that reacts to form NO2 at equilibrium. Therefore, the equilibrium concentrations are:

[NO] = 4 mol - 2x
[O2] = 2.5 mol - x
[NO2] = 2x

Using the equilibrium constant Kc = [NO2]^2 / ([NO] * [O2]), we can plug in the equilibrium concentrations:

0.001 = (2x)^2 / ((4 - 2x)(2.5 - x))

Solving for x and substituting back into the equilibrium concentrations, we can determine the equilibrium concentrations of each substance.