Question
In: Chemistry
Questions for Crystal Violet Lab. Give the derivation of a first order rate equation and show...
Questions for Crystal Violet Lab.
- Give the derivation of a first order rate equation and show why the plots of Ln ([dye]o/[dye]t) vs t should be linear.
- What property other than [dye]t and [dye]o could have been used for the plot of Ln ([dye]o/[dye]t) vs t? Explain your answer.
Solutions
Expert Solution
For the 1st part, just integrate the differential form of rate equation to get the integrated form and compare it with a general equation of a strain line to see whether it is linear or not (Spoiler alert: it is linear).
Use Beer-Lambert law to change the concentration terms to corresponding absorbance terms.
queen_honey_blossom answered 1 year agoRelated Solutions
1. Based on your experimental determined rate law for the reaction of crystal violet and hydroxide ion, how would doubling the concentration of crystal violet affect the reaction rate?
Trial 1
Time
Trans
A=2-log %T
Ln(A)
1/A
1:57
19.0
0.721
-0.327
1.39
2:52
22.0
0.658
-0.419
1.52
3:51
24.5
0.611
-0.493
1.64
4:54
27.3
0.564
-0.573
1.77
5:53
29.7
0.527
-0.641
1.90
6:54
33.6
0.474
-0.747
2.11
7:55
36.2
0.441
-0.819
2.27
8:54
40.0
0.398
-0.921
2.51
9:52
40.5
0.393
-0.934
2.54
10:53
45.3
0.344
-1.07
2.91
11:58
47.7
0.321
-1.14
3.12
13:02
52.2
0.280
-1.27
3.57
14:02
55.3
0.257
-1.36
3.89
14:59
56.0
0.252
-1.38
3.97
15:59
59.4...
The indicator crystal violet, (V) reacts with NaOH (OH- ) according to the equation: CV(aq) +...
The indicator crystal violet, (V) reacts with NaOH (OH- )
according to the equation: CV(aq) + OH- (aq) → CV- (aq) (Violet)
(Colorless) The rate law for the reaction is: Rate = k2 [CV]
[NaOH]. In an experiment the concentration of NaOH exceeds that of
the crystal violet by a factor of 1000 so the rate law becomes Rate
= k1 [CV] where k1 = k2 [NaOH] . The following data were obtained
for the reaction of crystal violet with...
The indicator crystal violet, (V) reacts with NaOH (OH- ) according to the equation: CV(aq) +...
The indicator crystal violet, (V) reacts with NaOH (OH- )
according to the equation: CV(aq) + OH- (aq) → CV- (aq) (Violet)
(Colorless) The rate law for the reaction is: Rate = k2 [CV]
[NaOH]. In an experiment the concentration of NaOH exceeds that of
the crystal violet by a factor of 1000 so the rate law becomes Rate
= k1 [CV] where k1 = k2 [NaOH] . The following data were obtained
for the reaction of crystal violet with...
A.) Write the equation which describes the reaction between crystal violet and hydroxide ion. B.) A...
A.) Write the equation which describes the reaction between
crystal violet and hydroxide ion.
B.) A solution is prepared by mixing 25.0 mLs of 4.84*10^-6 M
crystal violet solution with 20.0 mLs of 0.10 M NaOH solution and
diluted to a final volume of 100.0 mLs. Determine the limiting
reagent.
C.) After the reaction has gone to completion, calculate the
concentration of all species in the reaction.
D.) How does the concentration of sodium hydroxide change over
the course of...
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0
25
35
45
k/s-1
1.06x10-5
3.19x10-4
9.86x10-4
2.92x10-3
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