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Chemistry Coursework: Experiment explaining whether surface area affects reaction rate Planning: Purpose We are investigating whether a certain mass of marble chips (CaCO ) changes the rate of reaction when added to hydrochloric acid. Key Factors In this experiment I have the choice to change any variable to see what effects it could have. I am choosing to change the mass of carbonate chips. The other variables I could choose from to investigate are: Concentration of the hydrochloric acid- How weak or strong it is. The temperature of the acid. Surface area of the conical flask. Time taken Amount of Hydrochloric acid. Whether the serringe has been cleaned out or not The Equation. Calcium + Hydrochloric> Calcium + Water + Carbon Dioxide. Carbonate Acid Chloride The Chemical Equation CaCo (s) + 2HCl (aq)> Ca Cl (aq) + H O +Co (g). Prediction I predict that as the more marble chips are added the more the temperature rises, the average Speed of particles increases. At high temperatures, there...

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