Question

The rate law for a certain enzymatic reaction is zero order with respect to the substrate. The rate constant for the reaction is $6.4 \times 10^{2} M \mathrm{~s}^{-1}$. If the initial concentration of the substrate is $0.275 \mathrm{~mol} \mathrm{~L}^{-1}$, what is the initial rate of the reaction?

Name: Problem 65, Chapter 13: Chemistry: The Molecular Nature of Matter
Uploaded: 2021-07-08T18:57:27-08:00
Duration: 1 min 16 s
Channel: Anthony Han
Description: The rate law for a certain enzymatic reaction is zero order with respect to the substrate. The rate constant for the reaction is 6.4 ×10^2 M s^-1. If the initial concentration of the substrate is 0.275 mol L^-1, what is the initial rate of the reaction?

   The rate law for a certain enzymatic reaction is zero order with respect to the substrate. The rate constant for the reaction is $6.4 \times 10^{2} M \mathrm{~s}^{-1}$. If the initial concentration of the substrate is $0.275 \mathrm{~mol} \mathrm{~L}^{-1}$, what is the initial rate of the reaction?

Chemistry: The Molecular Nature of Matter

Neil D. Jespersen,… 7th Edition

Chapter 13, Problem 65

Instant Answer

Solved by Expert Anthony Han

07/08/2021

Step 1

Step 1: The rate law for a zero order reaction is given by the equation: \[Rate = k\] where $k$ is the rate constant. Show more…

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The rate law for a certain enzymatic reaction is zero order with respect to the substrate. The rate constant for the reaction is $6.4 \times 10^{2} M \mathrm{~s}^{-1}$. If the initial concentration of the substrate is $0.275 \mathrm{~mol} \mathrm{~L}^{-1}$, what is the initial rate of the reaction?

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Key Concepts

Rate Constant

The rate constant is a proportionality factor in the rate law that quantifies the speed of a reaction under given conditions. For a zero order reaction, it directly represents the rate of the reaction because the substrate concentration does not affect the reaction rate.

Reaction Rate Calculation

For a zero order reaction, the reaction rate is calculated simply using the rate constant, since the substrate concentration does not play a role. The initial rate is equal to the rate constant, making the calculation straightforward.

Zero Order Kinetics

In zero order kinetics, the rate of reaction is independent of the concentration of the substrate. This means that even if the substrate concentration changes, the reaction rate remains constant as long as other conditions (such as enzyme saturation) are maintained.

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