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Question about Kinetics: Reaction Rate

Chemistry

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Kinetics: Reaction Rate

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(Originais Teachy 2023) - Question Medium of Chemistry

During a practical class in the chemistry laboratory, an educator proposed to the students the analysis of the reaction between hydrogen peroxide (H2O2) and potassium permanganate (KMnO4) in an acidic medium, producing water (H2O) and manganese ion (II) (Mn2+). The students were informed that after 20 minutes of reaction, the concentration of H2O2 decreased from 0.1 mol/L to 0.06 mol/L. a) Calculate the average decomposition rate of H2O2 in this time interval. b) If the reaction were carried out in the presence of an appropriate catalyst and the same concentration variation occurred in just 5 minutes, calculate the new average decomposition rate of H2O2. c) Compare the average decomposition rates of H2O2 in the two cases and discuss the importance of using catalysts in chemical reactions.

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