character: Professor Mark Williams
topic: The Role of pH in Biological Systems and Chemical Reactions
grade: 12
subject: Chemistry
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character: Dr. Sarah Johnson
topic: Impact of pH on Enzyme Activity
grade: 12
subject: Chemistry
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character: Mr. David Chen
topic: Applications of pH in Environmental Chemistry
grade: 12
subject: Chemistry
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character: Ms. Emily Davis
topic: Acid-Base Reactions in Living Organisms
grade: 12
subject: Chemistry
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