Nitrogen reacts with hydrogen to form ammonia
N2(g)+3H2(g)<==>2 NH3(g)
At a certain temperature the equilibrium constant kc =2.0. An equilibrium mixture is found to contain concentration of N2 equal to 0.15 M and H2 equal to 0.30 M.what is the concentration of NH3 in this mixture
We can use the equilibrium constant expression, which relates the concentrations of the reactants and products in an equilibrium mixture to the equilibrium constant:
Kc = [NH3]2 / ([N2][H2]3)
Here, we know the equilibrium constant Kc = 2.0, [N2] = 0.15 M, and [H2] = 0.30 M. We can plug in these values and solve for [NH3]:
2.0 = [NH3]2 / (0.15)(0.30)3
2.0 × (0.15)(0.30)3 = [NH3]2
0.02025 = [NH3]2
[NH3] = sqrt(0.02025) = 0.142 M
Therefore, the concentration of NH3 in the equilibrium mixture is 0.142 M.