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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![Consider the following enzyme-catalyzed reaction:
S - P
Which of the following statements are correct:
| When [S]<<Km, the reaction order is one.
In the presence of the enzyme, the interconversion of S and P occurs more
rapidly.
When [S]>>Km, the reaction rate will be determined primarily by the enzyme
concentration and not the substrate concentration.
| When [S]<<Km, the reaction order is zero.
The maximum reaction velocity is determined by the Michaelis constant, Km:](https://content.bartleby.com/qna-images/question/2a6b0336-9bcc-4101-b57e-fb5dab8beb59/9df7752d-cf86-43e8-b65e-8a1baabdce2b/i7dt6x_thumbnail.png)
Transcribed Image Text:Consider the following enzyme-catalyzed reaction:
S - P
Which of the following statements are correct:
| When [S]<<Km, the reaction order is one.
In the presence of the enzyme, the interconversion of S and P occurs more
rapidly.
When [S]>>Km, the reaction rate will be determined primarily by the enzyme
concentration and not the substrate concentration.
| When [S]<<Km, the reaction order is zero.
The maximum reaction velocity is determined by the Michaelis constant, Km:
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- 2. Imagine you run a reaction whose free energy of activation (AG*) is 18 kcal/mol. If it were a first order reaction, its’ half life (the time for half the starting material to go away) or half the product to form (assuming a 100% yield) would by In2/k where k is the rate constant. How long will it take for the reaction to be done if you run the reaction in an ice-salt bath at room temperature (20 °C) if the rate constant were 1 x 104/sec?arrow_forwardThe following enzyme-catalyzed reaction follows zero-order kinetics. When the initial concentration of the reactant is 1.82 M and the rate constant is 1.43 M/min. What will be the remaining concentration in M of the reactant after 1.0 minute? Please report with 2 decimal places, without units. S--> Parrow_forward[RCOOH], M [R’OH], M [HA], M Initial Rate, M-min 23. 0.35 0.35 0.50 4.60 0.62 0.35 0.50 8.14 0.35 0.81 0.50 10.6 0.35 0.50 0.75 9.84 Rate = k[RCOOH][R'OH] Rate = k[RCOOH][R'OH][HA] Rate = k[RCOOR']/{[RCOOH][R'OH]} Rate = k[R'OH] Rate = k[RCOOH] 26. The initial reaction rate for the reaction in question 23 can be followed spectrophotometrically by quenching the reaction and determining the amount of R'OH left by its reaction with the dichromate ion, Cr20-2-. Write a balanced equation for the reaction of Cr20,2- with R'OH in acid solution. For simplicity, you may assume R' is an ethyl group (CH3CH2) and the products of the reaction are Cr3+ and CH3COOH. ЗСНЗСН20Н() + 2Cr2072-(аq) + 16H+{аq) + 3СНЗСООН() 4C13+(aq) + 3CH3COOCH3(I) + 14H2O(1) --> 3CH3CH2OH(I) + 2Cr2072-(aq) + 16H+(aq) ЗСНЗСООН() + 11Н20() 4Cr3+(aq)+ + --> --> 4CR3+(aq)++ 3CH3CH2OH(I) + 2Cr2072-(aq) + 5H2O(I) ЗСНЗСООН() + 160H-(аq) CH3CH2OH(I) + Cr2072-(aq) 2Cr3+(aq)+ + CH3COOH(I) --> СНЗCН2ОH() + Cr2072-(aq) Cr3+(aq)+ +…arrow_forward
- Enzymes are kinetically important for many of the complex reactions necessary for plant and animal life to exist. However, only a tiny amount of any particular enzyme is required for these complex reactions to occur. Explain.arrow_forwardWhich of the following is an INCORRECT description about the below rate law expression? rate = k [A]m[B]n k stands for the rate constant, which can be affected by temperature only. n is the individual order with respect to B. In general n is the same as the coefficient of reactant B. m is the individual order with respect to A. In general m is an integer.arrow_forwardIn a particular dating method, optically active proteins in organic material racemerize over time according to first-order kinetics. D--> L. Calculate the rate of this reaction if 10% of the D is transformed in 175 years.arrow_forward
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