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Science coursework - Investigating How Concentration of Acid Effects the Reaction Between Calcium Carbonate and Hydrochloric Acid Introduction According to the collision theory temperature, concentration, surface area and catalysts all affect rates of reaction as shown in the diagrams below. Increasing any of these should increase the number of collisions and so increase the reaction rate up to an optimum point. Increasing the temperature causes the particles to collide with more energy and more frequently, thereby increasing the reaction rate. Surface area is like concentration in that the greater numbers of particles present means that a useful collision is more likely (collision theory). Catalysts provide a surface area for reactions to take place on and so also increase the chances of a reaction. I will be investigating concentration and how it affects the rate of reaction in the reaction between calcium carbonate and hydrochloric acid. Concentration will be my variable...

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