
Interpretation:
From the given information how to determine rate constant k from molar mass measurements has to be described.
Concept introduction:
Rate law: It is an equation that related to the
Rate: The rate is nothing but the change in concentration of substrate (reactant) or target (product) with time.
- The change in concentration term is divided by the respective
stoichiometric coefficient . - The negative sign indicates that substrates (reactants) concentration decrease as per the reaction progress.
- Rate of reaction is always represented by positive quantities.

Answer to Problem 19.132QP
From the given information how to determine rate constant k from molar mass measurements is described.
Explanation of Solution
We can write the balanced reaction from the given information as follows
The average molar mass can be given by
Based on the stoichiometry of the reaction, the concentration of
Substitute back into equation (1) it comes as
From the proposed mechanism, the denaturation step is rate-determining step, thus
Now, look back at the change in the concentration over time, for that we use first-order integrated rate law.
Substitute this in equation (2),
Therefore, the rate constant, k, is determined by plotting a graph
From the given information rate constant k from molar mass measurements was described.
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Chapter 19 Solutions
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