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For each of the following cases, identify the order with respect to the reactant

ID: 1064677 • Letter: F

Question

For each of the following cases, identify the order with respect to the reactant A.

For each of the following cases, identify the order with respect to the reactant, A. Case (A rightarrow products) The half-life of A decreases as the initial concentration of A decreases. A twofold increase in the initial concentration of A leads to a fourfold increase in the initial rate. A twofold increase in the initial concentration of A leads to a 1.41-fold increase in the initial rate. 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. The rate of decrease of [A] is a constant.

Explanation / Answer

1. Zero order

2. rate = K[A]2 second order

3. rate = K[A]1/2

      1/2 order

4. t = 2.303/Klog[A0]/[A/2]

       =2.303*0.3010/K = 0.6932sec

5. Zero order