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Science Coursework; Chemistry Rates of Reaction Aim and background information: The purpose of this study was to investigate the catalysts of reaction rate between substances; the elements used to test this were chips of calcium carbonate (CaCO3) and hydrochloric acid (HCl) of varying molarity. In order to complete the task I first had to examine and comprehend the basic principles that form reaction rates. Primarily, two theories must be studied, these are the Collision theory and the principles of Activation energy. Collision Theory:- The collision theory states that in order for a reaction to occur between two species they must come into contact with each other. They must also collide the right way and with enough energy for the bonds to break (this is known as the Activation energy which is examined below). The more particles that are required to obtain a certain reaction, the less likely the chances are that it will occur. This...

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