Given below is the reaction between the benzylchromium complex and iodine. Accor

Question

Given below is the reaction between the benzylchromium complex and iodine. According to definition, determine the overall reaction order. ArCH_2 CrL_n^2+ + I_2 doubleheadarrow ArCH_2 I + CrL_n^3+ + I^- rate = k [ArCH_2 CrL_n^2+]^3/2 [I_2]^1/2 overall reaction order: _________ Define the rate of reaction (differential rate expression) of each of the products and reactants for the following oxidation of hydrogen peroxide by permanganate. 2 KMnO_4 (aq) + 3 H_2 SO_4(aq) + ? H_2 O_2 (aq) rightarrow 2 MnSO_4 (aq) + 8 H_2 O_(l) + 5 O_2 (g) + ? K_2 SO_4 (aq) Consider a 1^st order reaction described by the following differential rate law -d[A]/dt = k[A]. a. If the concentration of A is equal to one half its initial concentration after 1180 s, what is the first order rate constant. b. Calculate the time required for 95% of A to be consumed. c. Calculate the time required for 95% of A to be consumed in a 2^nd order reaction which obeys the rate law: -d[A]/dt = k[A][B], Assume that [A]_o = [B]_o = 1.5 M and that the numerical value of k is the same as part (a).

Explanation / Answer

1.

rate = k [ArCH2CrLn2+]3/2 [I2]1/2

Order w.r.t ArCH2CrLn2+ (a) = 3/2

Order w.r.t I2 (b) = 1/2

Overall order of reaction n = a + b = 3/2 + 1/2 = 4/2 = 2

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