character: Mr. Johnson
topic: Acid-Base Reactions
grade: 12
subject: Chemistry
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character: Dr. Smith
topic: Understanding the pH Scale
grade: 12
subject: Chemistry
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character: Ms. Thompson
topic: Types of Acids and Bases
grade: 12
subject: Chemistry
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character: Professor Lee
topic: Calculating pH and pOH
grade: 12
subject: Chemistry
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