For the reaction A+2B → C ,the rate of reaction is 1.76 × 10 − 3 Ms -1 at the time when [A] =0.3580 M. a. What is the rate of formation of C? b. What will [A] be 1.00 min later? c. Assume the rate remains at 1.76 × 10 − 5 M s -1 . How long would it take for (A) to change from 0.3580 to 0.3500 U?
For the reaction A+2B → C ,the rate of reaction is 1.76 × 10 − 3 Ms -1 at the time when [A] =0.3580 M. a. What is the rate of formation of C? b. What will [A] be 1.00 min later? c. Assume the rate remains at 1.76 × 10 − 5 M s -1 . How long would it take for (A) to change from 0.3580 to 0.3500 U?
Solution Summary: The author explains the formula to calculate rate of formation of C.
For the reaction
A+2B
→
C
,the rate of reaction is
1.76
×
10
−
3
Ms
-1
at the time when [A] =0.3580 M.
a. What is the rate of formation of C?
b. What will [A] be 1.00 min later?
c. Assume the rate remains at
1.76
×
10
−
5
M
s
-1
. How long would it take for (A) to change from 0.3580 to 0.3500 U?
Definition Definition Study of the speed of chemical reactions and other factors that affect the rate of reaction. It also extends toward the mechanism involved in the reaction.
In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo-
hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number
of significant figures.
B. Freezing Point of Cyclohexane plus
Calculation Zone
Unknown Solute
2. Mass of cyclohexane (g)
10.14
Part C.4
3. Mass of added solute (g)
0.255
C. Calculations
1. k; for cyclohexane (°C⚫ kg/mol)
20.0
2. Freezing point change, AT, (°C)
3.04
Part C.6
3. Mass of cyclohexane in solution (kg)
4. Moles of solute, total (mol)
Show calculation.
5. Mass of solute in solution, total (g)
6. Molar mass of solute (g/mol)
Show calculation.
Chapter 20 Solutions
General Chemistry: Principles And Modern Applications Plus Mastering Chemistry With Pearson Etext -- Access Card Package (11th Edition)
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