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Chemistry Coursework - Rates of reaction Aim Safety To investigate the effect of concentration on the rate of reaction between sodium thiosulphate (Na2S2O3 ) and hydrochloric acid. As we know, acids are very dangerous chemicals; therefore, precautions need to be taken to avoid accidents while conducting this experiment. To ensure that this experiment is carried out safely, safety goggles should be worn at all times to prevent damage to the eyes in the case of an accident. Scientific Information The rate of a chemical reaction can be followed by measuring the rate at which the products are formed or the rate at which the reactants are used up. This allows a comparison to be made of the changing rate of a chemical reaction under different conditions. The speed (rate) of a chemical reaction increases :- A) if the temperature increases B) if the concentration of dissolved reactants or the pressure of gases increases C) if solid...

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