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28th February 02 Year 10 Science Coursework Rates of Reactions Introduction This year in chemistry we have been studying different types of reactions and what affects their rate. To help with this work, we have been given an experiment to investigate and analyse the factors influencing the rate. What is the rate of a reaction? The rate of a reaction is a measurement of its speed. It is calculated by measuring how quickly reactants are used up or products are formed. (Usborne Illustrated Dictionary of Science) Planning Our task is to investigate ONE of the factors affecting a particular reaction. The reaction we are going to investigate is:- Magnesium + Hydrochloric acid --> Magnesium Chloride + Hydrogen Mg + 2HCl --> MgCl2 + H2 I have chosen to investigate this reaction because it will be easy to measure the rate. Hydrogen gas is given off and so I will be able to collect and measure it. Many factors can...

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