Describe the effect of increasing the concentration of reactants on the position of equilibrium according to Le Chatelier's principle.

Increasing the concentration of reactants causes the equilibrium to shift to the right, favoring the formation of products. This shift occurs because the system seeks to counteract the change by consuming the added reactants, thus producing more products. This answer is anchored to Equilibrium and Le Chatelier's principle.

Increasing the concentration of reactants causes the equilibrium to shift to the right, favoring the formation of products. This shift occurs because the system seeks to counteract the change by consuming the added reactants, thus producing more products. is the best answer because it directly supports the AQA A-Level Chemistry objective to explain why catalysts do not change the position of equilibrium. This reasoning is anchored to Equilibrium and Le Chatelier's principle in Chemical equilibria, Le Chatelier's principle and Kc, and it separates change from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.