Water Crisis: Stoichiometry

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Water Crisis: Stoichiometry STEM Case

There has been an outbreak of Legionnaires' disease in a small town. This disease is caused by legionella bacteria that proliferate in contaminated water supplies. Students take on the role of an environmental engineer to investigate the source of legionella and use stoichiometry to decontaminate the water supply and remediate the disease outbreak.

STEM Cases are interactive explorations in which students practice problem-solving and critical thinking as they solve a real world problem as a STEM professional.
  • View students results in realtime.
  • Cases take 30-90 minutes to complete.
  • Student progress is automatically saved.
  • Complete in multiple sessions.


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LevelDescriptionEstimated Time
High School  This version is for general chemistry classes. 45-55 min
AP  This version is for AP level classes. 50-60 min

Expanded Handbook

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Most content from the Expanded Handbook is included in the corresponding STEM Case.

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LevelDescriptionEstimated Time
High School  The Expanded Handbook that accompanies the High School version of this case also covers significant figures in addition to the concepts covered in the handbook section of the high school case. 20-25 min
AP  This Handbook is identical to the handbook section in the AP Case. 25-30 min


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