Problem: The rate law for a reaction is rate = k[A]2[B]2. The units of the rate constant when the concentrations are measured in mol/L and the time in seconds areA. M-3 s-2B. M-1 s-1C. M-2 s-1D. M-3 s-1E. M-1 s-3

FREE Expert Solution

We’re being asked to determine the units of the rate constant when the concentrations are measured in mol/L and the time in seconds. Were given the rate law for a reaction:

rate = k[A]2[B]2


We can determine the unit of the rate constant from its rate lawRecall that the rate law only focuses on the reactant concentrations and has a general form of:

rate law=kAxBy

k = rate constant
A & B = reactants
x & y = reactant orders


To determine the unit of the rate constant, we will use the following equation:

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Problem Details

The rate law for a reaction is rate = k[A]2[B]2. The units of the rate constant when the concentrations are measured in mol/L and the time in seconds are

A. M-3 s-2
B. M-1 s-1
C. M-2 s-1
D. M-3 s-1
E. M-1 s-3

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