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…showed last 75 words of 1212 total…other variables that can be investigated which can affect the rate of reaction. They are: pressure, light, catalysts and particle size. In conclusion my results are sufficient enough to prove that the collision theory is correct. The reliability of this investigation is suitable enough to support a firm conclusion that the rate of reaction speeds up if the concentration of a solution is higher. This has been proven by my experiment and the collision theory.