3/2016 06:00 AM 18.8/30 t Print Calculator Periodic Table 39 of 51 Sapling Learn

Question

3/2016 06:00 AM 18.8/30 t Print Calculator Periodic Table 39 of 51 Sapling Learning A particular reactant decomposes with a half-life of 135 s when its initial concentration is 0.376 M. The same reactant decomposes with a half-ife of 235 s when its initial concentration is 0.216 M. Determine the reaction order. What is the value and unit of the rate constant for this reaction? Select answer AO Previous 8 Give Up & View solution 2Check Answer Next Hint about us l careers l partners privacy policy terms of use

Explanation / Answer

1. The order of reaction is 2 .Half life of second order reaction is depends on initial concentration, t1/2 = 1/k[A]0. The second order rate equation is 1/[A]t = 1/[A]0 + 2kt for A+B second order reactant and the rate equation is 1/[A]t = 1/[A]0 + kt for reactant A=B reactant

2. The unit for second order rate constant 1/Ms, where M stand for Molarity and s stands for second.

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