Question

In words, Cecil is imagining an experiment in which the concentration of A falls from 0.340 M to 0.120 M in 56.0 seconds. Cecilia is imagining an experiment in which the concentration of A falls from 0.980 M to 0.930 M in 10.0 seconds. Cecil had to swap his concentrations over, as many of you will have to. Cecilia had to add 10 seconds to her time

(a)​Assume you have a first-order reaction.  Calculate k and t½, the half-life of ​your reaction, and write them below. Keep to 3 significant figures.

k = ​ t½ =

B) Imagine that you intend to perform exactly the same first-order reaction​another time, except that you make a mistake. You accidentally start off with ​double the [A]0 {Cecil’s new [A]0 would be 0.680 M}. Write down k, t½, and the ​new [A] if you measured it after t - just like the last time (56.0 s for Cecil).

k =​ t½ =​   ​[A] after t =

C)Now let’s go back to part (a) and imagine that you did the same thing, with ​exactly the same starting and final concentrations and time t, except this time ​you had zero-order reaction kinetics. Calculate the value of k assuming​the reaction was zero-order, keeping 3 significant figures.

k=

D)Again, let’s go back to part (a) and imagine that you did the same thing, ​with exactly the same starting and final concentrations and time t, except this ​time you had second-order reaction kinetics. Calculate the value of k if the ​reaction was second-order, keeping 3 significant figures.

k =

2)Evaluate, keeping 3 significant figures:

​

Where:​ v = 2.33 × 1015​ w = 2.23 × 1016​

​x = 2.13 × 1017​ y = 2.22 × 1014​

Answer 1