character: Mr. John Smith
topic: Understanding pH Scale and Its Applications
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: Acid-Base Theories and pH Measurement Techniques
grade: 12
subject: Chemistry
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character: Ms. Rachel Lee
topic: The Importance of pH in Biological Systems
grade: 12
subject: Chemistry
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character: Mr. Thomas Edwards
topic: Using the pH Scale in Environmental Science
grade: 12
subject: Chemistry
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