Multiple Choice
Which of the following rate constants is negligible for the initial velocity (V 0) of an enzyme-catalyzed reaction?
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6. Enzymes and Enzyme Kinetics
Rate Constants and Rate Law
Multiple Choice
Calculate the reaction rate for the following simple reaction if k = 1.3 x 10 -1 M-1s-1, initial [A] = 4.0 x 10-3 M, and the initial [B] = 6.0 x 10 -3 M (for simple reactions, assume coefficients are reaction orders):
A + B → 2C
A
2.13 x 10-6 M.
B
3.12 x 10-6 M/s.
C
1.32 x 10-6 s.
D
3.12 x 10-6 M-1s-1.
Verified step by step guidance1
Identify the rate law for the reaction. For a simple reaction A + B → 2C, the rate law can be expressed as: rate = k[A][B].
Substitute the given values into the rate law equation. Here, k = 1.3 x 10^-1 M^-1s^-1, [A] = 4.0 x 10^-3 M, and [B] = 6.0 x 10^-3 M.
Calculate the reaction rate by multiplying the rate constant (k) with the concentrations of the reactants: rate = (1.3 x 10^-1 M^-1s^-1) * (4.0 x 10^-3 M) * (6.0 x 10^-3 M).
Ensure that the units are consistent and correctly cancel out to give the rate in M/s.
Interpret the calculated rate in the context of the problem, ensuring it matches the expected units and magnitude for a reaction rate.
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