character: Dr. Green
topic: Water Purification Techniques using Chemical Reactions
grade: 12
subject: Chemistry
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character: Professor Blue
topic: Advanced Filtration Methods in Water Treatment
grade: 12
subject: Chemistry
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character: Ms. White
topic: The Role of Acids and Bases in Water Quality Improvement
grade: 12
subject: Chemistry
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character: Mr. Black
topic: Oxidation-Reduction Reactions in Water Disinfection
grade: 12
subject: Chemistry
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