character: Mr. Thompson
topic: Introduction to the pH Scale
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Acids and Bases Overview
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Chemical Properties of Acids and Bases
grade: 9
subject: Chemistry
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character: Mr. Anderson
topic: Measuring pH Levels with Indicators
grade: 9
subject: Chemistry
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