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Chemistry SC1 Coursework. Investigating the effect of changing concentration on the rate of a chemical reaction. Aim: In this experiment I'm going to investigate how the concentration affects the rate of reaction between marble chips and Hydrochloric Acid when I vary the concentration 5 times. Equation Equation The equation that we are going to use for this Experiment is: Variables Temperature - · If we Increase the temperature of a reaction It increases the rate of the reaction. At a higher Temperatures reactant particles move faster and Collide more often and more violently. Whereas Concentration - by starting with two molars of hydrogen peroxide we can dilute the acid to the measurements that we want. The surface area- Changing the surface area of the marble chips each time into smaller pieces it will give the reactant more to collide with and therefore speed up the rate of reaction. Catalyst- adding an element to an experiment will speed up the reaction without getting used up....

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