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PLAN Aim: The aim of this investigation is to find out and observe how temperature affects the rate of reaction. I am going to investigate the changes caused to the solution of hydrochloric acid and sodium thiosulphate when the temperature is changed. Prior Knowledge/Research: The rate of reaction is the speed at which a chemical reaction precedes, expressed in terms of the amount of time taken for a certain reaction to fully occur. The rate of reaction can be affected by a number of factors: Temperature Concentration Pressure Adding a catalyst Surface area/particle size Light The one that I am going to be investigating and explaining about is temperature. Prediction: An increase of temperature increases the kinetic energy of the particles and hence the number of successful collisions with enough energy to break existing bonds and make product parties. The minimum energy needed for a successful collision is called the activation energy and the level of energy needed to start a...

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