ID ezto.mheducation com HwK Chapter 13 Cheag l Guided S The Reaction 2A B ls Che
ID: 552110 • Letter: I
Question
ID ezto.mheducation com HwK Chapter 13 Cheag l Guided S The Reaction 2A B ls Chemistry I Chegg.com ID n Com D Chegg Study Guided S Question 9 (of 19) Save & Exit Submit 9 5.26 points Be sure to answer all parts. Report problem The reaction 2A B is second order with a rate constant of 51.0/M. min at 24°C. Would you like to try another version of this question? (a) Starting with IAo -8.70 x 10 M, how long wil it take for [Al, 2.60 x 103 Mr min By doing so, you l start from scratch and lose all points associated with this question (b) Calculate the half-life of the reaction. Try another References eBook & Resources Multipart Answer Difficulty: 3 Difficulty: MediumExplanation / Answer
a)
we have:
[A]o = 0.00870 M
[A] = 0.00260 M
k = 51 M-1.min-1
By seeing the unit of k, it is 2nd order reaction
use integrated rate law for 2nd order reaction
1/[A] = 1/[A]o + k*t
1/(0.00260) = 1/(0.00870) + 51*t
384.6154 = 114.9425 +51*t
51*t = 269.6729
t = 5.29 min
Answer: 5.29 min
b)
we have:
k = 51 M-1.min-1
use relation between rate constant and half life of 2nd order reaction
t1/2 = 1/([A]o*k)
= 1/(0.0087*51)
= 2.25 min
Answer: 2.25 min
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