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The rate of a reaction (how fast it proceeds) may depend on the concentration of various species involved in the reaction. It may depend on the concentration of one species i.e. [A] or two species, i.e. [A]2 or [A][B] etc.
A second-order rate law indicates that the indices (powers) of all the species add up to a total of 2. Which of the following is an overall second-order rate law? Note: [A] = concentration of A and k is a rate constant.