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Title: Factors affecting reaction speed. Research Question: To explore how temperature and concentration of reactants affect reaction speed of the reaction speed between sodium thiosulphate and hydrochloric acid? Background Information: As the temperature of the reactants increases the reaction speed will increase. According to the collision theory, when two chemicals react, their molecules have to collide with each other with sufficient energy for the reaction to take place. The two molecules will only react if they have enough energy. By heating the mixture, you will raise the energy levels of the molecules involved in the reaction. According to the kinetic theory, increasing temperature means the molecules move faster. However, the main reason why it increases the rate of reaction is that more of the colliding particles will have the necessary activation energy resulting in more successful collisions According to the collision theory, increasing the concentration of the reactants will increase the frequency of...

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