What is the numerical value for Q for this reaction? Remember to always express your answer to correct number of significant figures.

The reaction is not at equilibrium because Q >P hence the reaction moves towards the left hand side.
The equilibrium constant is a figure that tells us the extent to which the reactants have been converted to products in a reaction.
Now we have the reaction; PCl3(g) + Cl2(g) ⇄ PCl5(g) hence we can write;
Q = [PCl5]/[PCl3] [Cl2]
Q = 0.39/0.21 * 0.41
Q = 4.5
The reaction is not at equilibrium because Q >P hence the reaction moves towards the left hand side.
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