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132 solutions

Reaction Mechanism

Q. The experimental rate law for the reaction below is equal to k[NO2]2. Is the proposed two-step mechanism valid? Explain. A.No; the overall stoichiometry of the reaction is not correct. B.No; the derived rate law does not match the experimental law. C.No; NO3cannot appear in the mechanism. D.Yes; the experimental and derived rate laws are consistent. E.Yes; two moles of NO2are used in Step 1, and this leads to the square in the rate law.

Solved • Feb 19, 2020

Reaction Mechanism

Q. A generic reaction occurs via the following sequence of elementary steps. What is the rate law based on this reaction mechanism? A.rate =k [E]2 D.rate =k [D]. B.rate =k [B][C]. E.rate =k [A][C]. C.rate =k [A][B]

Solved • Feb 19, 2020

Reaction Mechanism

Q. Which species is an intermediate in the following two-step mechanism?(1) H2O2(aq)+ I−(aq)-->H2O(l)+ OI−(aq)(2) H2O2(aq)+ OI−(aq)-->H2O(l)+ O2(g)+ I−(aq) A.I− D.OI− B.H2O2. E.no intermediates. C.H2O

Solved • Feb 16, 2020

Reaction Mechanism

Q. What is the rate law for the overall reaction if the following two-step mechanism is proposed?(1) H2(g)+ 2NO(g)-->N2O(g)+ H2O(g)slow. (2) N2O(g)+ H2(g)-->N2(g)+ H2O(g)fast. A.k[H2][NO]. D.k[H2]2[NO]2 B.k[H2]2[NO]. E.k[H2][N2O]. C.k[H2][NO]2

Solved • Feb 16, 2020

Reaction Mechanism

Q. Metals often form several cations with different charges. Cerium, for example, forms Ce^3+ and Ce^4+ ions and thallium forms Tl^+ and Tl^3+ ions. Cerium and thallium ions react as follows: 2Ce^4+ (aq) + Tl^+ (aq) → 2Ce^3+ (aq) + Tl^3+ (aq) this reaction is very slow and is thought to occur in a single elementary step. The reaction is catalyzed by the addition of Mn^2+ (aq) according to the following mechanism: Ce^4+ (aq) + Mn^2+ (aq) → Ce^3+ (aq) + Mn^3+(aq) Ce^4+ (aq) + Mn^3+ (aq) → Ce^3+ (aq) + Mn^4+(aq) Mn^4+ (aq) + Tl^+ (aq) → Mn^2+ (aq) + Tl^3+ (aq) The catalyzed reaction is first order in [Ce^4+] and first order in [Mn^2+]. Which of the steps in the catalyzed mechanism is rate determining? a) Ce^4+ (aq) + Mn^2+ (aq) → Ce^3+(aq) + Mn^3+ (aq) b) Ce^4+ (aq) + Mn^3+ (aq) → Ce^3+(aq) + Mn^4+ (aq) c) Mn^4+(aq) + Tl^+ (aq) → Mn^2+ (aq) + Tl^3+ (aq)

Solved • Feb 11, 2020

Reaction Mechanism

Q. Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3X → E + F 2. E + M → F + N What is the rate law for step 2 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is k[A][C]^3 type k*[A]*[C]^3.

Solved • Feb 11, 2020

Reaction Mechanism

Q. Consider the following elementary steps that make up the mechanism of a certain reaction: 1. 3X → E + F 2. E + M → F + N What is the rate law for step 1 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is k[A][C]^3 type k*[A]*[C]^3.

Solved • Feb 11, 2020