Multiple Choice
The rate law for an elementary and/or nonelementary reaction is _________________________:
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6. Enzymes and Enzyme Kinetics
Reaction Orders
Multiple Choice
Consider the nonenzymatic elementary reaction A B. When the [A] = 20 mM, the reaction velocity is measured as 5 µM of 'B' produced per minute. Calculate the rate constant for the reaction. Hint: Consider the rate law.
A
6.0 x 102min-1
B
2.5 x 10-4min-1
C
3.7 x 10-5min-1
D
9.1 x 10-2min-1
Verified step by step guidance1
Identify the type of reaction: The problem describes a nonenzymatic elementary reaction A -> B, which follows first-order kinetics.
Write the rate law for a first-order reaction: The rate of the reaction is given by the equation v = k[A], where v is the reaction velocity, k is the rate constant, and [A] is the concentration of reactant A.
Substitute the given values into the rate law: The reaction velocity v is 5 µM/min, and the concentration [A] is 20 mM. Convert units if necessary to ensure consistency.
Solve for the rate constant k: Rearrange the rate law equation to solve for k, giving k = v / [A].
Calculate the rate constant: Substitute the values into the rearranged equation to find the rate constant k, ensuring that the units are consistent and correctly converted if needed.
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