character: Mr. John Smith
topic: Understanding pH and its Importance
grade: 12
subject: Chemistry
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character: Dr. Emily Johnson
topic: Acid-Base Reactions in Everyday Life
grade: 12
subject: Chemistry
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character: Ms. Sarah Lee
topic: The Role of pH in Biological Systems
grade: 12
subject: Chemistry
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character: Mr. Robert Davis
topic: Measuring pH: Techniques and Tools
grade: 12
subject: Chemistry
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