Concept explainers
(a)
Interpretation: A second-order reaction that is presumed to occurs via an
Concept introduction:
The change in reactant concentration over the course of the specified period can be viewed as the rate of a
(b)
Interpretation: A second-order reaction that is presumed to occurs via an
Concept introduction:
The change in reactant concentration over the course of the specified period can be viewed as the rate of a chemical reaction. According to the rate rule, the active concentration of the reactant molecules directly affects how quickly a chemical reaction proceeds. The rate constant is the name for the proportionality constant.
(c)
Interpretation: A second-order reaction that is presumed to occurs via an
Concept introduction:
The change in reactant concentration over the course of the specified period can be viewed as the rate of a chemical reaction. According to the rate rule, the active concentration of the reactant molecules directly affects how quickly a chemical reaction proceeds. The rate constant is the name for the proportionality constant.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
EBK ORGANIC CHEMISTRY-PRINT COMPANION (
- 3) A certain first-order reaction has a half-life of 20.0 minutes. a. Calculate the rate constant for this reaction. b. What time is required for this reaction to be 75% complete?arrow_forwardComplete all parts please: In the reaction CH3Br + OH- --> CH3OH + Br- when the OH- concentration alone was doubled, the rate increased by 4. When both OH- and CH3Br are each increased by 2 the rate increased by a factor of 8. a. write out the rate law for this reaction. b. What is the order of reaction with respect to OH-? c. What is the overall order of the reaction? d. What are the units of the rate constant, kr ?arrow_forwardA certain alkyl halide, R-X, undergoes an elimination reaction. The observed rate law for this reaction is: Rate = k(R-X). What is the mechanism for this reaction? Select one: O A. E2 O B. E1 O C. O D. SN2 SN1arrow_forward
- You are told that the hydrolysis of aspirin follows zero order kinetics. Which ONE of the following graphs is correct? A [aspirin] B D m t rate rate [aspirin]2 B. [aspirin] D. rate rate EV [aspirin] [aspirin] C. E.arrow_forward20 Proposed mechanism for a reaction is O3 + NO2 ------------> NO3 + O2 slow NO3 + NO2 ---------> N2O5 fast What are the intermediates in the proposed mechanism? a. O3 b. NO2 c. N2O5 d. NO3arrow_forwardBenzocaine hydrolyzes by reaction with water. The rate law for the reaction is shown below. Rate = k [benzocaine]x [H2O]y In the case where benzocaine is dissolved in water, this reaction would be ________ with an observed rate constant equal to ________. a. pseudo x order, k [H2O]y b. pseudo x order, k [benzocaine]x c. pseudo y order, k [H2O]y d. pseudo y order, k [benzocaine]xarrow_forward
- The following reaction is first order with respect to (CH3)3CBr and zero order with respect to CH3OH. The rate constant for the reaction is 2.28 x 10² s¹ at 25°C. (CH3)3CBr + CH3OH (CH3)3COCH3 + HBr a. Write the rate law expression for this reaction. b. If initial concentration of (CH3)3CBr is 0.225 M, how long does it take for 75.0% of the (CH3)3CBr to react? c. What would the concentration of (CH3)3CBr be after 20.0 minutes? d. What is the half-life for this reaction?arrow_forwardGiven the reaction: 4 HBr+ 02 2 H20+2 Br a.) Would you expect this reaction to take place in a single step? Why or why not? b.) This reaction is thought to take place by means of the following mechanism: Step 1: HBr + O2 HOOBR (slow) Step 2: HBr + HQOBr 2 HOBI (fast) Step 3: 2 HBr +2 HOBr 2 H2O + 2 Br2 (fast) i. Identify the two intermediates. ii. Which step has the greatest activation energy? ii. How many "peaks" will the potential energy diagram for the reaction mechanism have? iv. Which step is called the rate determining step in this mechanism? v. In order to have successful collisions, the colliding particles must have both the proper amount of energy and the proper (fill in blank)? vi. On the set of axes below, draw the shape of the curve you might expect for the reaction in this question. The overall reaction is exothermic. Enthalpy Progress of Reaction c.) A catalyst is discovered which increases the rate of Step 3. How will this affect the rate of the overall reaction? Explain…arrow_forwardWhich reaction do you think has a larger rate constant (faster rate)? I. НCI + H,О > Н,О" + СI I. СН,Br + ОН > СН,ОН + Br 8.arrow_forward
- Proposed mechanism for a reaction is O3 + NO2 ------------> NO3 + O2 slow NO3 + NO2 ---------> N2O5 fast What are the intermediates in the proposed mechanism? Select one: a. O3 b. NO2 c. N2O5 d. NO3arrow_forwardWhat type of mechanism is the given reaction most likely to follow? A 1. D 4. Br excess HBr ОН + 1. E1 2. S,2 3. S,1 4. E2 2. 3.arrow_forwardGiven the following mechanism: 2NO N202 step 1 (fast, call the rate constants k1 and k-1) N202+H2N20 + H20 (slow, call the rate constant for this step k2) step 2 (call the rate constant for this step ka) N20 H2 N2 H20 step 3 Determine the overall reaction. а. b. Are there any intermediates in this reaction mechanism? If so, which one(s)? Determine the rate law. Intermediates may not appear in rate laws. Use the equilibrium с. expression to write the rate law only in terms of [reactants]. What is the overall order of the reactions? d. What is the molecularity of the rate determining step? е.arrow_forward
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning