2.5.1 - How Indicators Work
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Practice Questions
Test your understanding with targeted questions
What is the color change of Methyl Red in acidic conditions?
💡 Hint: Think about how the color looks in relation to pH.
What does an indicator represent in a chemical reaction?
💡 Hint: Consider what happens when you add acid or base.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What happens to an indicator when the pH decreases?
💡 Hint: Think about how H plus ions influence the equilibrium.
True or False: An indicator can only transition between two colors.
💡 Hint: Focus on the nature of acid-base indicators.
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Challenge Problems
Push your limits with advanced challenges
You have a weak acid indicator with a pKa of 4.5. What is the expected color change range for this indicator?
💡 Hint: Remember to use pKa ± 1.
A universal indicator shows a shift from red at pH 1 to purple at pH 14. What does this tell you about its usefulness?
💡 Hint: Consider what range has been covered by this indicator.
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