character: Mr. Smith
topic: Introduction to Acids and Bases
grade: 9
subject: Science
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character: Ms. Johnson
topic: Properties of Acids and Bases
grade: 9
subject: Science
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character: Mr. Lewis
topic: pH Scale and Indicators
grade: 9
subject: Science
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character: Dr. Taylor
topic: Neutralization Reactions
grade: 9
subject: Science
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