Question
The rate constant for a certain reaction has the units- concentration/time. What is the order of the reaction? A. 0 B 1 c 2 D 3 E -1
Answer
4.3
(274 Votes)
Clara
Professional · Tutor for 6 years
Answer
B
Explanation
The order of a reaction is directly related to the units of the rate constant for that reaction. This information can be used to find the order of reaction. The question mentions that the units are concentration/time. According to the Arrhenius rate equation, the rate constant (k) has the dimension M^1-n T^-1 , where n is the order of reaction and M is the concentration (molarity). Here, considering the unit, it seems to be first order, because the unit of a first-order reaction is s^-1 (times^-1) or M^-1 times^-1, indicating the k's dimension to be M^0 T^-1. This represents a first-order reaction.