5. Catalytic decomposition of hydrogen peroxide is a re

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5. Catalytic decomposition of hydrogen peroxide is a reaction of the first order. The kinetics of decomposition was studied by titration of samples with a solution of KMnO 4. The results of the titration are shown in the table. Determine the reaction rate constant of the decomposition of hydrogen peroxide.
Reaction τ, min A 2H2O2 = O2 + 2H2O
And the concentration of hydrogen peroxide, mol / l
0 10 30
2.28 · 10−3 1.38 · 10−3 5.0 · 10−4

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