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If the concentration of reactants is higher is the reaction rate higher?


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June 01, 2009 3:30AM

The rate of the forward reaction will increase if the concentration of the reactants is increased.

This is explained by collision theory. When there are more molecules in a given space (a higher concentration) with the same energy, the molecules will collide more frequently, since they will move about randomly and are more likely to hit one another if there are more of them around and less empty space. A reaction requires a collision, so more collisions in a given amount of time will lead to more molecules reacting in that time, giving a higher rate of reaction overall (in the forward direction).