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CHEMISTRY MAJOR PRACTICAL ON FACTORS AFFECTING THE RATE OF REACTION AIM: To examine the ways in which changing the concentration of the reactant affects the rate of the reaction. The two chemicals used as reactants are Sodium Thiosulfate (Na2S2O3 (aq)) and Hydrochloric acid (HCL (aq)). The equation of the reaction is Na2S2O3 (aq) + HCL (aq) 2NaCl(aq) + H2O (l) + SO2 (g) +S(g) HYPOTHESIS/PREDICTION As reactions between solids reactants is much slower than liquid reactants we normally use liquids. According to the Collision theory three conditions must be satisfied before a reaction between molecules can occur. These are: a) the molecules must collide with one another b) the molecules must be made in a way that the right bonds can be broken and made c) there should be enough energy to make sure that the reaction can occur The first of the above three conditions affect this reaction. This is...

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