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To determine the activation energy of the reaction between Bromide and Bromate ions in acid solution.
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| Submitted: Wed Sep 10 2003
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Title: Chemical Kinetics Aim: To determine the activation energy of the reaction between Bromide and Bromate ions in acid solution Introduction: 5Br-(aq) + BrO3- (aq) + 6H+(aq) -->--->-> 3Br2(aq) + 3H2O(l) The above reaction can be studied by adding a small amount of methyl orange and a small but known amount of phenol to standard KBr (aq). When mixing the KBr solution with the KBrO3 solution (containing H2SO4), Br2 was generated. As soon as all the phenol has reacted with the Br2, the excess free Br2 will bleach the methyl orange to give a colourless solution. So the time for the reaction to proceed to a given point may be determined. Experimental: Phenol solution (10.0cm3, 0.01 M, 1x10^-4 mol), KBr (0.083 M) and KBrO3 (0.017M) mixture (10.0cm3) and 10 drops of methyl red indicator were put into a boiling tube. Sulphuric acid (5.0 cm3, 0.5M, 0.0025 mol) was put into a second test tube. Both...
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