O Expanded Outline: ENGL-1S| Purdue owL APA Formattit ! (21879 unread)-a.g.brizz
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O Expanded Outline: ENGL-1S| Purdue owL APA Formattit ! (21879 unread)-a.g.brizz@._ University of Oklahoma × + | saplingleaming.com/ibiscm php?id-3871620 Andrea Brisby Sapling Learning macmillan learning Jump to... Available I Due Date Points Pos Grade Cat Question 24 of 28 14 Map db Sapling Learning 15 A reactant decomposes with a half-life of 105 s when its initial concentration is 0.205 M. When the initial concentration is 0.638 M, this same reactant decomposes with the same half-life of 105 s 16 150 What is the order of the reaction? Policies: Solutions 17 18 You can You can You have There is 19 20 What is the value and unit of the rate constant for this reaction? 21 eTextbo Number M- s1 Help Wi 23 24 Web He 25 7:32 PM ^ Qs 11/29/2017 | Type here to searchExplanation / Answer
a)
For a first order reaction, half life is independent of initial concentration.
Half life = 105 s
Order = 1
b)
For a first order reaction,
CA = CA0 exp(-k t)
Ln(CA0/CA) = k t
At t = t1/2 = 105 s, CA = CA0/2
Ln(CA0 / (CA0/2)) = k t1/2
Ln(2) = k * 105 s
k = 0.693 / 105 s-1
k = 0.0066 s-1
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