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Chemistry Techniques and Explorations: An Introductory Chemistry Laboratory Manual: Post-Lab Questions

Chemistry Techniques and Explorations: An Introductory Chemistry Laboratory Manual
Post-Lab Questions
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table of contents
  1. About PA-ADOPT
  2. About OER
  3. About the Author
    1. Author Acknowledgements
    2. Goal of Laboratory Manual
  4. Table of Contents
  5. Safety and Record Keeping
    1. Safety Rules
    2. RAMP Approach to Safety
    3. Laboratory Notebook
    4. References
  6. Separating Substances, Measuring Mass, and Analyzing Data - Technique Laboratory
    1. Introduction for Measurement of Masses
    2. Separating a Heterogeneous Mixture and Determining Masses
    3. Experiment
    4. Safety Considerations
    5. Waste Disposal
    6. Introduction for Treatment of Data
    7. Pre-Lab Questions
    8. Post-Lab Questions
    9. References
  7. Measuring Volumes - Technique Laboratory
    1. Motivation
    2. Cleaning Glassware for Volumetric Measurements
    3. Volume Measuring Devices
    4. Practice Technique for Graduated Cylinder, Volumetric Pipet, and Volumetric Flask
    5. Waste Disposal
    6. Safety Considerations
    7. Pre-Lab Questions
    8. Post-Lab Calculations and Questions
  8. Reaction Types and Qualitative Analysis - Technique Laboratory
    1. Introduction
    2. Observing Chemical Reactions
    3. Oxidation-Reduction Reactions: Movement of electrons
    4. Acid-Base Reactions: Movement of H+
    5. Precipitation Reactions: Solid Formation
    6. Flame Tests
    7. Safety Considerations
    8. Waste Disposal
    9. Pre-lab Questions
    10. Post-Lab Questions
  9. What is Contaminating the Water Supply? - Exploration Laboratory
    1. Background
    2. Experiment
    3. Available Materials
    4. Data Collection
    5. Safety Considerations
    6. Waste Disposal
    7. Pre-Lab Questions
    8. Post-Lab Questions
  10. Titrations Technique Laboratory
    1. Titration Background and Application
    2. Safety Considerations
    3. Disposal of Waste
    4. Laboratory Activities
    5. Calculations
    6. Pre-Lab Questions
    7. Post-Lab Questions
    8. References
  11. What is the Acidity of Vinegar? - Exploration Laboratory
    1. Background
    2. Experiment
    3. Safety Considerations
    4. Disposal of Waste
    5. Pre-Lab Questions
    6. Post-Lab Questions
    7. References
  12. Absorption Spectroscopy Technique Laboratory
    1. Absorbance Spectroscopy Background
    2. Ultraviolet-Visible Absorbance Spectroscopy
    3. Safety Considerations
    4. Disposal of Waste
    5. Laboratory Activities
    6. Calculations
    7. Pre-Lab Questions
    8. Post-Lab Questions
    9. References
  13. What is the Dye Composition of a Drink?-Exploration Laboratory
    1. Background
    2. Experiment
    3. Safety Considerations
    4. Disposal of Waste
    5. Pre-Lab Questions
    6. Post-Lab Questions
    7. References

Post-Lab Questions

  1. What dyes are present in your powdered drink mix?
  1. What are the concentrations of the dyes in the drink mix you measured?
  1. How many milligrams of each dye are in an entire packet of the drink mix?
  1. If you drink one serving of the drink, how many milligrams of dye would you

ingest?

  1. Ingredients on a food label are listed in order from highest amount to lowest

amount. Are your results consistent with the food label on your drink mix

packet?

References

Sigman SB and Wheeler DE. “The Quantitative Determination of Food Dyes in

Powdered Drink Mixes. A High School or General Science Experiment.” Journal of

Chemical Education, 2004, 81: 1475–1478. DOI: 10.1021/ed081p1475.

Thermo Scientific “Food Dyes and Beer’s Law” Lesson Plan, 2019, FL53099,

https://assets.thermofisher.com/TFS-Assets/MSD/Scientific-Resources/FL53099-

food-dyes-beers-law-qc-lesson-plan.pdf Accessed December 13, 2022.

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