ChemLab1 - Studying the Rate of the Reaction of Potassium...

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Studying the Rate of the Reaction of Potassium Permanganate and Oxalic Acid Kate Parrott Lab Partner: Elena Lombardo Lab Section: Monday at Noon
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Goal: The goal for this lab is to find and record order, and write an equation for the reaction of potassium permanganate and oxalic acid. We also wanted to see if temperature had an effect on the reaction rate and the activation energy of these two substances. Data/Results: Part I. In order to calculate the rate of the reaction of potassium permanganate and oxalic acid, we had to first calculate the concentration of the substances and then record the amount of time it took for each reaction to occur. We knew a reaction was complete when the red coloring of the potassium permanganate had disappeared in the oxalic acid. Calculation 1: Determination of the reaction rate: Avg. reaction rate = Avg. [KMnO 4 ] (M) / Avg. Time (s) Avg. reaction rate = 0.0108M / 456s Avg. reaction rate = -2.37 x 10 -5 M -1 s -1 Table 1: Reaction rate as a function of reactant concentrations Experiment # Average Time (s) Average [KMnO 4 ] (M) Average [H 2 C 2 O 4 ] (M) Average rxn rate (M -1 s -1 ) 1 456 0.0108 0.315 -2.37 x 10 -5 2 240 0.0108 0.629 -4.49 x 10 -5 3 489 0.0216 0.315 -4.45 x 10 -5 Calculation 2: Determining the Reaction Order:
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ChemLab1 - Studying the Rate of the Reaction of Potassium...

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