l.) Oxalate complexes like the one synthesized in this reaction can be oxidized
ID: 997912 • Letter: L
Question
l.) Oxalate complexes like the one synthesized in this reaction can be oxidized using Mn3+ ions in solution. The kinetics of this reaction have been studied, and the proposed mechanism is
i.) A student studies the course of the oxidation reaction by measuring the absorbance of the oxalate over time at 580 nm. In the study, Mn3+ ions are
in large excess so that the concentration of Mn3+ remains relatively constant over time. The student generates the following graphs.
Absorbance vs. Time
ln(absorbance) vs. Time
1/(absorbance)
It is known that the reaction is first order in terms of Mn3+. Using the graphs above, complete the rate law for this oxidation reaction.
ii.) Other than temperature, describe two factors that could influence the rate of this reaction.
iii.) Use the kinetics data below to determine the energy of activation for the first step in the reaction mechanism.
ii.) What would be the minimum change in entropy necessary for this reaction to be spontaneous?
Explanation / Answer
2. Solvent,concentration,catalysts
5.sign should be positive.
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