What is the relationship between concentration and rate of reaction?
not related
directly proportional
inversely proportional
partially related

Answer;

Directly proportional

Explanation;Concentration is one of the factors that determine the rate of a reaction. Reaction rates increases with increase in the concentration of the reactants, which means they are directly proportional.An increase in the concentration of reactants produces more collisions and thus increasing the rate at which the reaction is taking place. Therefore, Increasing the concentration of a reactant increases the frequency of collisions between reactants and will cause an increase in the rate of reaction.