Question

Which of the following best explains why most chemical reactions proceed more quickly when the concentrations of reactants are increased?
A.The increased concentration increases the number of collisions between molecules.
B.The products of chemical reactions are more stable at higher concentrations. C.At higher concentrations, reactant molecules move more quickly.
D.At higher concentrations, product molecules are able to catalyze the reaction.

Answer 1

A More concentrated means more collisions per unit volume, and as the volume stays the same and only concentration changes, the there are more collisions