character: Dr. Smith
topic: The Chemistry of Water Purification
grade: 11
subject: Chemistry
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character: Mr. Jones
topic: Principles of Filtration and Distillation
grade: 11
subject: Chemistry
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character: Ms. Garcia
topic: Chemical Reactions in Water Treatment
grade: 11
subject: Chemistry
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character: Dr. Lee
topic: Impact of Chemical Pollutants on Water Quality
grade: 11
subject: Chemistry
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