# Problem: Identify the order with respect to the reactant, A.  (A → product) i) The half-life of A increases as the initial concentration of A decreases.   ii) A two fold increase in the initial concentration of A leads to a four fold increase in the initial rate.   iii) A two fold increase in the initial concentration of A leads to a 1.41-fold increase in the initial rate.   iv) The time required for [A] to decrease from [A] 0 to [A]0/2 is equal to the time required for [A] to decrease from [A]0/2 to [A]0/4.   v) The rate of decrease of [A] is a constant.

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Identify the order with respect to the reactant, A.

(A → product)

i) The half-life of A increases as the initial concentration of A decreases.

ii) A two fold increase in the initial concentration of A leads to a four fold increase in the initial rate.

iii) A two fold increase in the initial concentration of A leads to a 1.41-fold increase in the initial rate.

iv) The time required for [A] to decrease from [A] 0 to [A]0/2 is equal to the time required for [A] to decrease from [A]0/2 to [A]0/4.

v) The rate of decrease of [A] is a constant.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Identifying Reaction Order concept. If you need more Identifying Reaction Order practice, you can also practice Identifying Reaction Order practice problems .

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Based on our data, we think this problem is relevant for Professor Harwood's class at UNI.