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chm1046l experiment 21 postlab

chm1046l experiment 21 postlab - Brad Deitemeyer Laurene...

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Brad Deitemeyer Laurene Scopa Rates of Chemical Reactions Purpose: The purpose of this experiment was to determine the rate law of a given reaction. By finding the rate constant k and the reaction orders m , n , and p , the differential can be found. Method: The clock reaction method was used to measure the rate of the reaction. Five reaction mixtures were given with various amounts of each reagent. With the aid of a starch indicator, we were able to time when the BrO 3 - ion has reacted for each mixture. In all the reaction mixtures used in this experiment, the color change occurred when a constant predetermined number of moles of BrO 3 - had been used up by the reaction. The rate of each reaction is then determined by the time required for the color to change. The time can then be converted to the relative rate of the reaction (1000/ t ), and the relative rate can then be used to determine the reactant concentrations. From there, with the data from the five reaction mixtures, the rate law can be determined. The next part of the
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