character: Chemistry Guru
topic: pH Scale and Indicators
grade: 9
subject: Chemistry
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character: Science Explorer
topic: Understanding Acids and Bases
grade: 9
subject: Chemistry
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character: Lab Assistant
topic: Using pH Indicators in Experiments
grade: 9
subject: Chemistry
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character: Chemistry Whiz
topic: The Importance of pH in Chemical Reactions
grade: 9
subject: Chemistry
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