character: Mr. Smith
topic: Acids, Bases, and pH Indicators
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Chemical Reactions and Equations
grade: 9
subject: Chemistry
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character: Ms. Davis
topic: The pH Scale and Its Importance
grade: 9
subject: Chemistry
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character: Dr. Liu
topic: Indicators and Their Use in Acid-Base Chemistry
grade: 9
subject: Chemistry
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