character: Dr. Sarah Lopez
topic: Techniques for Measuring pH in Environmental Samples
grade: 12
subject: Chemistry
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character: Dr. Emily Carter
topic: The Importance of pH in Soil Health
grade: 12
subject: Chemistry
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character: Mr. John Smith
topic: Laboratory Methods for pH Measurement in Aquatic Systems
grade: 12
subject: Chemistry
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character: Dr. Michael Tran
topic: pH Indicators and Their Use in Environmental Science
grade: 12
subject: Chemistry
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