Homework Help is Here – Start Your Trial Now!
Science
Chemistry
explain what the results of this experiment are and the purpose Table 2 Absorbance vs CoCl2 concentration Test Tube Number Cobalt Chloride Concentration (mol/mL) Absorbance at 510 nm 1 0.000 0.000 2 0.009 0.024 3 0.018 0.055 4 0.027 0.085 5 6 0.036 0.045 0.112 0.138 7 (Unknown) 0.088

explain what the results of this experiment are and the purpose Table 2 Absorbance vs CoCl2 concentration Test Tube Number Cobalt Chloride Concentration (mol/mL) Absorbance at 510 nm 1 0.000 0.000 2 0.009 0.024 3 0.018 0.055 4 0.027 0.085 5 6 0.036 0.045 0.112 0.138 7 (Unknown) 0.088

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question

explain what the results of this experiment are and the purpose

Table 2   Absorbance vs CoCl2 concentration

 

Test Tube Number

Cobalt Chloride Concentration    (mol/mL)

Absorbance at

510 nm

 

 

 

1

0.000

0.000

2

0.009

0.024

3

0.018

0.055

4

0.027

0.085

5

6

0.036

0.045

0.112

0.138

 

7

 

(Unknown)

 

0.088

 
Add 5.0 mL of the unknown cobalt chloride to test tube 7. 2. 3. Cover test tubes 2-5 with parafilm and mix using a vortex mixer. Set the wavelength on the spectrophotometer to the absorption peak found in procedure 1. 4. Using a clean plastic transfer pipette for each of the solutions, add 3.0 mL of solution from 5. each test tube into separate cuvettes. 6. Blank spectrophotometer using cuvette 1 by pressing "0/ABS." 7. Put the remaining cuvettes in the spectrophotometer and record the absorbances of each cuvette in the table below. There is no need to blank the spectrophotometer before each cuvette since the wavelength is not being changed. 8. Compare the absorbance to the standard cobalt chloride curve and read the concentration directly from the graph as shown in the introduction. 9. Pour the cobalt chloride solutions into the labeled waste bottle. Cobalt Chloride Test Tube Number Absorbance at 510 nm Concentration (mol/mL) 1 0.000 0024 0.009 0.024 0.018 0.055 0.027 # ตาร 0.015 0.112. 0.036 0.045 0-138 M (Unknown) COTE 2 3 4 5 6 7 460
Transcribed Image Text:Add 5.0 mL of the unknown cobalt chloride to test tube 7. 2. 3. Cover test tubes 2-5 with parafilm and mix using a vortex mixer. Set the wavelength on the spectrophotometer to the absorption peak found in procedure 1. 4. Using a clean plastic transfer pipette for each of the solutions, add 3.0 mL of solution from 5. each test tube into separate cuvettes. 6. Blank spectrophotometer using cuvette 1 by pressing "0/ABS." 7. Put the remaining cuvettes in the spectrophotometer and record the absorbances of each cuvette in the table below. There is no need to blank the spectrophotometer before each cuvette since the wavelength is not being changed. 8. Compare the absorbance to the standard cobalt chloride curve and read the concentration directly from the graph as shown in the introduction. 9. Pour the cobalt chloride solutions into the labeled waste bottle. Cobalt Chloride Test Tube Number Absorbance at 510 nm Concentration (mol/mL) 1 0.000 0024 0.009 0.024 0.018 0.055 0.027 # ตาร 0.015 0.112. 0.036 0.045 0-138 M (Unknown) COTE 2 3 4 5 6 7 460
Wavelength (nm) 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 7 7 Absorbance 0.035 0.043 олоо 0.091 0.143 0. 269 0.321 0.304 0.398 0 445 toe'o ольо 0.452 0.395 0.297 0.005 0.137 0500 о.оча seo'o геото ② 0.018 о.оде 0.62 ов 0.013 чтото 0.064 DOIL 2.8 602 0.003 о. ос 06| 6 PgUp
Transcribed Image Text:Wavelength (nm) 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 7 7 Absorbance 0.035 0.043 олоо 0.091 0.143 0. 269 0.321 0.304 0.398 0 445 toe'o ольо 0.452 0.395 0.297 0.005 0.137 0500 о.оча seo'o геото ② 0.018 о.оде 0.62 ов 0.013 чтото 0.064 DOIL 2.8 602 0.003 о. ос 06| 6 PgUp
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Quality Assurance and Calibration Methods
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS