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S-18
e.
Report the average value for the rate constant, k, including units. (0.4 marks)
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3.
In the calculations of the rate law for this reaction, it is assumed that the concentrations of the
reactants remains constant during the interval before the color change (i.e. “method of initial
rates”). Is this a valid assumption? Explain why, including in your answer the calculation for the
percent of the iodide ion and peroxydisulfate ion consumed during this during this interval for
Run #1 only. (1.0 marks)
