Consider the reaction 3 A(aq) + B(aq) 2 Claq) If the rate of consumption of A is

Question

Consider the reaction 3 A(aq) + B(aq) 2 Claq) If the rate of consumption of A is 2.93x10 4 1 Ms ,what is the rate of production of C? Select one O a. 4.88x10 M s b. 1.95x10 Ms O c. 9.77x10 M s 5 For a reaction involving reactant X, which rate law is consistent with the following observation A plot of Inp] vs. time is a straight line. Select one: O a. rate k O b. rate-kX For a reaction involving reactant X, which rate law is consistent with the following observation: lfittakes 24 s for pg to drop from 016M to 0.08M, it takes 72 s to drop from 0.16 to 0.04M. Select one: O a. rate-kp O b. rate-kpx c.rate = k The concentratiog of reactant A was monitored over time and the following data were obtained: t-0, [A]-1.07x10 M t-366 s, [A]-5.35x10 M t-732 s, [Aj-2.68x10 M Which of the following rate laws is consistent with the data? .3 Select one a. rate (2.55x10 s)[A] b.rate (1.89x103 M1s1)IA c. rates(1.89x10 s) [A] O d. rate (2.55x10 M s )A 3 -1 '

Explanation / Answer

1)

rate of reaction in terms of A is:

rate of reaction = (1/3)*rate of consumption of A

rate of reaction in terms of C is:

rate of reaction = (1/2)*rate of production of C

equate both:

(1/2)*rate of production of C = (1/3)*rate of consumption of A

rate of production of C = (2/3)*rate of consumption of A

= (2/3)*(2.93*10^-4 M/s)

= 1.95*10^-4 M/s

Answer: b

2)

integrated rate law for 2nd order reaction:

1/[A] = 1/[A]o + k*t

so, for 2nd order 1/concentration vs time is linear

integrated rate law for 1st order reaction:

ln [A] = –kt + ln [A]o

so, for 1st order ln(concentration) vs time is linear

integrated rate law for zero order reaction:

[A] = [A]o – k*t

ln[X] vs time is linear for 1st order reaction

Answer: b

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