(a) Select all of the correct statements about reaction rates from the choices below. 1.The lower the rate of a reaction the longer it takes to reach completion. 2 The rate of a reaction is independent of temperature. 3 Slow reactions can be speeded up by raising the temperature. 4. Reaction rates increase with increasing temperature. 5. Solid catalysts do not affect reaction rates. 6. Reactions involving very unstable combinations of chemicals have large rate constants. 7. A balanced chemical reaction is necessary to relate

(a) Select all of the correct statements about reaction rates from the choices below. 1.The lower the rate of a reaction the longer it takes to reach completion. 2 The rate of a reaction is independent of temperature. 3 Slow reactions can be speeded up by raising the temperature. 4. Reaction rates increase with increasing temperature. 5. Solid catalysts do not affect reaction rates. 6. Reactions involving very unstable combinations of chemicals have large rate constants. 7. A balanced chemical reaction is necessary to relate

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter4: Acids And Bases

Section: Chapter Questions

Problem 4.22P: In each of the following three reaction coordinate diagrams, state: (a) Whether the reaction is...

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(a) Select all of the correct statements about reaction rates from the choices below. 1. The lower the rate of a reaction the longer it takes to reach completion.2. Slow reactions can be speeded up by raising the temperature.3. Reaction rates can show little change as masses of solid reactants increase.4. The slowest step in a reaction is called the rate-determining step.5. Reaction rates increase as reactant concentrations decrease.6. Reaction rate constants decrease with increasing temperature.7. As a reaction progresses its rate goes down.
A catalyst is a. A substance which increases the rate of a reaction by adding heat to it. b. A substance which increases the rate of a reaction without being used up in the reaction. c. An intermediate in a reaction which influences its rate. d. A solid which provides a "kick start" for the reaction, but is not affected by it.
Draw the energy diagram of the following reaction (label and draw reactants, intermediates, and products). Label transition state of the rate limiting step and draw the transition state of the rate determining step. Is it a concerted or stepwise reaction? Write the rate law for this reaction. How do we increase the reaction rate? If we use deutrium-tert-butyl bromide such as (CD3)3CBr instead of (CH3)3CBr, will it increase or decrease the reaction rate? Or there is no meaningful rate change. Write reasons for your answer. Draw mechanisms for reactions by drawing arrows and intermediates.
Which one of the following factors DOES NOT affect the rate of a chemical reaction? concentration C. temperature humidity D. nature of the reactants .The rate of a chemical reaction normally _______________________. increases as temperature decreases decreases when a catalyst is added increases as reactant concentration increases decreases as reactant concentration increases
Select all of the correct statements about reaction rates from the choices below. 1. The lower the rate of a reaction the longer it takes to reach completion.2. The rate of a slow step has more effect on the overall reaction rate than the rate of a fast step.3. Reaction rates decrease with increasing temperature.4. As a reaction progresses its rate goes down.5. Solid catalysts increase reaction rates as their surface areas increase.6. The rate of a reaction is independent of temperature.7. Reaction rates can show little change as masses of solid reactants increase.
Why does the rate of the reaction slow down with time? The rate constant slows with time because the reaction is exothermic and loses energy The reactants that react first are moving faster than the reactants that react last, which results in a slower reaction as time progresses The reaction rate depends upon the concentrations of the reactants. As the reaction progresses, the reactants are converted into products and their concentrations decrease The reaction does not slow down with time. The rate constant gets smaller with time so that it appears that the reaction is slowing The longer the reaction takes, the older the reactants become. Old reactants react more slowly than new ones so the reaction slows down
True or False 1. It is imperative that collision occurs between two reactant particles to proceed with the reaction.2. A lower energy of activation means that fewer molecules will have sufficient energy to undergo an effective collision.3. If a reaction has a low rate, it means that the molecules combine at a slower speed than a reaction with high rate.4. When pressure is increased, the rate of reaction between gas particles will decrease.5. Chemical catalysts experience change when they speed up rates of reactions.6. An increase in temperature generally decreases the activation energy.
Find a reaction that is typically facilitated by a catalyst. Write a paragraph (2 at most) detailing what the reaction is, what it is used for, what the catalyst is, how the catalyst increases the reaction rate, and how fast the reaction is with the catalyst.
4.Which of the following factors would not affect rate of reaction? A. Addition of Catalyst B. Climate C. Nature of reactants D. Temperature
Complete each sentence by matching with the correct statement.Increasing the concentration of a reactant: a. Increases the frequency and energy of molecular collisions which speeds up the rate of the reactionb. Reduces the energy and frequency of the collisions thus slowing down the rate of the reactionc. Increases the frequency of molecular collisions thus speeding up the rate of the reactiond. Increases the activation thus speeding up the rate of the reactione. Lowers the activation energy and speeds up the reactionf. Gives the molecules more energyAdding a catalyst to a reaction:a. Increases the frequency and energy of molecular collisions which speeds up the rate of the reactionb. Reduces the energy and frequency of the collisions thus slowing down the rate of the reactionc. Increases the frequency of molecular collisions thus speeding up the rate of the reactiond. Increases the activation thus speeding up the rate of the reactione. Lowers the activation energy and speeds up the…
What are all the main reaction mechanisms in organic chemistry?
(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.Reaction rate constants increase with increasing temperature.Catalysts increase reaction rates.Fast reactions can be slowed down by lowering the temperature.Slow reactions can be speeded up by raising the temperature.The rate of a reaction is the same as the rate constant of the reaction.Reaction rate constants decrease with increasing temperature.