Please help me determine the equilibrium constant for keq:

Question

What would be the equilibrium constant for keq with the following given information?

[N₂(g)]=2.0x10^-4 mol/L

[H₂(g)]=4.0x10^-3 mol/L

[NH₃(g)]=2.2x10^-4 mol/L

Answer 1

First, you need to know the reaction that is taking place when these reagents are mixed:

N₂ + 3H₂ <==> 2NH₃ ... balanced equation

Keq = [NH₃]² / [N₂][H₂]³

Assuming that the information provided represents the equilibrium concentrations, we have the following:

Keq = (2.2x10^-4)² / (2.0x10^-4)(4.0x10^-3)³

Keq = 4.8x10^-8 / 1.28x10^-11

Keq = 3.75x10³