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20 solutions

Reaction Mechanism

Q. Given the following 2 step model reaction, what is the rate law ?

Solved • Jul 22, 2019

Reaction Mechanism

Q. the rate laws were determined for the following reactions: Reaction 1: rate= k[A] ^2 reaction 2 rate = k [A] [B] ^1/2 reaction 3 rate = k [A]^2 [b]^2 reaction 4 rate k= [A] [B] ^2 reaction 5 rate= K= [A] ^2 [B]^-1 give the number of reactions that can be elementary reactions?? which ones are the right ones and why?

Solved • Jul 18, 2019

Reaction Mechanism

Q. Consider the below reaction mechanism: Step 1: S(s) + O2(g) ⇌ SO2(g) fast; k1 = rate constant for forward reaction; k-1 = rate constant for reverse reaction Step 2: SO2(g) + 1/2 O2(g) SO3(g) slow; k2 = rate constant Step 3: SO3(g) + H2O(l) H2SO4(l) fast, k3 = rate constant c) What is the rate law of the overall reaction? I just don't understand how to rewrite the law without the intermediaries!

Solved • Jul 13, 2019

Reaction Mechanism

Q. The catalytic destruction of ozone occurs via a two-step mechanism, where X can be any of several species: (1) X + O3 -> XO + O2 [slow] (2) XO + O -> X + O2 [fast] (a) Write the overall reaction. (b) Write the rate law for each step (using k for the rate constant). (c) X acts as a ___ and XO acts as a ___ (d) High-flying aircraft release NO into the stratosphere, which catalyzes this process. When O3 and NO concentrations are 9 x 10^12 molecule/cm^3 and 4.9 x 10^9 molecule/cm^3, respectively, what is the rate of O3 depletion? The rate constant k for the rate-determining step is 6 x 10^-15(cm^3)^2/molecule*s. Give your answer in scientific notation. Use one significant figure on your answer.

Solved • Jul 10, 2019

Reaction Mechanism

Q. The rate law for 2 NO(g) + O2(g) -> 2 NO2(g) is rate = k[NO]^2[O2]. The following mechanism have been proposed: I. 2 NO(g) + O2(g) -> 2 NO2(g) II. 2 NO(g) <-> N2O2(g) [fast] N2O2(g) + O2(g) -> 2 NO2(g) [slow] III. 2 NO(g) <-> N2(g) + O2(g) [fast] N2(g) + 2 O2(g) -> 2 NO2(g) [slow] (a) Which of these mechanisms is consistent with the rate law? (b) Which of these mechanisms is most reasonable?

Solved • Jul 10, 2019

Reaction Mechanism

Q. Consider the following mechanism: (1) ClO-(aq) + H2O(l) <-> HClO(aq) + OH-(aq) [fast] (2) I-(aq) + HClO(aq) -> HIO(aq) + Cl-(aq) [slow] (3) OH-(aq) + HIO(aq) -> H2O(l) + IO-(aq) [fast] (a) What is the overall equation? Select the single best answer. (b) Identify the intermediate(a), if any. Select the single best answer. (c) What are the molecularity and the rate law for each step? Select the single best answers. (d) Is the mechanism consistent with the actual rate law: rate = k[ClO-][I-]?

Solved • Jul 10, 2019

Reaction Mechanism

Q. A catalyst increases the rate of the reaction and is recovered completely at the end of the reaction. True or False

Solved • Jul 1, 2019