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Chemistry Techniques and Explorations: An Introductory Chemistry Laboratory Manual: What is Contaminating the Water Supply? - Exploration Laboratory

Chemistry Techniques and Explorations: An Introductory Chemistry Laboratory Manual
What is Contaminating the Water Supply? - Exploration Laboratory
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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

What is Contaminating the Water Supply? -

Exploration Laboratory

Background

A local town is concerned that the water from their well has started to become

contaminated. Preliminary testing has narrowed down the potential contaminant

to one of the following salts:

•Calcium Chloride

(CaCl2)

•Potassium Chloride

(KCl)

•Sodium Chloride (NaCl)

•Strontium Chloride

(SrCl2)

•Potassium Sulfate

(K2SO4)

•Sodium Sulfate

(Na2SO4)

•Sodium Acetate

(NaC2H3O2)

•Sodium Carbonate

(Na2CO3)

•Potassium Carbonate

(K2CO3)

Your job is to determine which contaminant is in the water supply, its

concentration in the water, and how hazardous the contaminant is to the people

consuming the water.

42

Boy acquiring water from a well.

Figure 5.1: "Urban Well Water" by FotoGrazio is licensed under CC BY-NC-ND 2.0. Figure 5.1: "Urban Well Water" by FotoGrazio is licensed under CC BY-NC-ND 2.0.

Figure 5.1: "Urban Well Water" by FotoGrazio is licensed under CC BY-

NC-ND 2.0.

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