Question

With the experimental data given for the kinetic study of the
reaction

A + 2B == AB2, answer the following two questions

Experiment [A] 0 M [B] 0 M Initial velocity formation rate of
AB2 (M / min)

1 0.5 1.5 4.2x10-3

2 1.5 1.5 1.3x10-2

3 3.0 3.0 5.2 x10-2

11.-Determine the law of speed for the reaction

Answer: ___________________________

12.- Calculate the value of the kinetic constant

Answer: __________________

Answer #1

Q1.

In order to calculate the rate law expression for a A+B reaction, we need to apply Initial Rates Method.

Note that the generic formula goes as follows:

r = k [A]^a [B]^b

Note that if we got at least 3 sets of point, in which we have A and B constant, then we could use:

r1 / r2 = (k1 [A]1^a [B]1^b) / (k2 [A]2^a [B]2^b)

If we assume K1 and K2 are constant, then K1= K2 cancel each other

r1 / r2 = ([A]1^a [B]1^b) / ( [A]2^a [B]2^b)

Then, order according to [A] and [B]

r1 / r2 = ([A]1/[A2])^a * ([B]1/[B]2)^b

If we get two points in which A1 = A2, then we could get B, and vise versa for A...

From the data shown in **YOUR** table

(4.2*10^-3)/(1.3*10^-2) = (0.5/1.5)^a

a = ln((4.2*10^-3)/(1.3*10^-2))/ln((0.5/1.5)) = 1

choose points:2 and 3

b order = 0, since ln(1) = 0

then

Rate = k*[A]^2

for k

choose any point

5.2*10^-2 = k*(3^2)

k = (5.2*10^-2)/(9)

k = 0.005777 1/Ms

The following data were obtained for the variation of initial
velocity and substrate for a reaction catalyzed by chymotrypsin
(5nM) at pH 8, 37 °C.
1. Using a linear plot, determine the KM and Vmax of the
chymotrypsin given the data below: (12)
[S] (μM) V0 (μmol/min)
0 0
0.5 200
1.0 400
1.5 580
2.0 750
2.5 840
3.0 860
4.0 875
6.0 890
The kcat/KM parameter is a measure of...

Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Express your answer to two significant figures and include the
appropriate units.
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.35
0.010
1.5×10−3
2
0.35
0.020
2.9×10−3
3
0.70
0.010
5.9×10−3

Properties of an Enzyme of Prostaglandin.
a) The kinetic data given below are for the reaction catalyzed
by prostaglandin endoperoxide synthase. Focusing here on the first
two columns, determine the Vmax and Km of the enzyme.
[Arachidonic acid
(mM)] Rate of
Formation of PGG2
(mM/min) Rate
of Formation of PGG2 with 10
.5
23.5 with
10mg/mL Ibuprofen (mM/min)
1.0 32.2
16.67
1.5
36.9
25.25
2.5
41.8
30.49
3.5
44.0 37.04
38.91
(sorry the table is wonky)
b) Ibuprofen is an inhibitor of...

Constants | Periodic Table
Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.50
0.050
1.5×10−2
2
0.50
0.100
3.0×10−2
3
1.00
0.050
6.0×10−2
Part a
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Express your answer to two significant figures and include the
appropriate units.
View Available Hint(s)...

Determine the rate law, including the values of the orders and
rate law constant, for the following reaction using the
experimental data provided.
Q + X --> products
Trial
[Q]
[X]
Rate
1
0.12 M
0.10 M
1.5 x 10-3 M/min
2
0.24 M
0.10 M
3.0 x 10-3 M/min
3
0.12 M
0.20 M
1.2 x 10-2 M/min

Consider the reaction
A+2B⇌C
whose rate at 25 ∘C was measured using three different sets of
initial concentrations as listed in the following table:
Trial
[A]
(M)
[B]
(M)
Rate
(M/s)
1
0.15
0.010
2.7×10−4
2
0.15
0.020
5.4×10−4
3
0.30
0.010
1.1×10−3
Calculate the initial rate for the formation of C at 25 ∘C, if
[A]=0.50M and [B]=0.075M.
Express your answer to two significant figures and include the
appropriate units.

Rate data for the reaction 2 CsF + XeF6 →
Cs2XeF8 were taken. Given the data below,
determine the rate law for the reaction.
Trial [CsF]0
(M)
[XeF6]0 (M)
rate0 (M/min)
1
0.10
0.20
0.0145
2
0.20
0.20
0.0289
3
0.30
0.40
0.0867

Please study the table of data below, collected for the gas
phase combination reaction of N2O with O3 at 298 K and constant
volume (1.00 L).
Experiment
[N2O]0
[O3]0
Initial rate of reaction of O3
(M/s)
1
.010
.010
6.01 x 10^-4
2
.010
.020
1.20 x 10^-3
3
.020
.020
1.19 x 10^-3
A) Please determine the order of each reactant and write the rate
law for the overall reaction.
B) The overall reaction is: N2O (g) + O3...

Using the given data, determine the rate constant of this
reaction: A+2B ----> C+D
Trial
[A]
(M)
[B]
(M)
Rate (M/s)
1
0.320
0.300
0.0121
2
0.320
0.600
0.0121
3
0.640
0.300
0.0484

Determining reaction rates?
In my book part A is given and I have to figure out part B. What
would be the equations steps needed to solve? I tried a few but am
Unsure if they are done properly.
A. Determination of Reaction Times
molar concentration of Na2S2O3(mol/L): 0.02
Volume of Na2S2O3(L): 0.001
ambient temp(oC): 25
molar concentration of KI (mol/ L) 0.3
molar concentration of H2O2 (mol/L) 0.1
Total kinetic volume of kinetic trial (mL): 10
Time for color...

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