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TOPIC: Indicators

This guide explores the concept of indicators, substances that change color within a narrow pH range. By using various indicators, you can more accurately determine the pH level of a solution. Learn to practice with a provided table and identify indicators based on color and pH. For example, discover which indicator appears yellow at pH 9.82 and which one turns blue at pH 5.6. Analyze common household substances like vinegar, baking soda, and cabbage juice to understand their pH levels and the indicators that can be used with them.

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TOPIC: Indicators

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Presentation Transcript

  1. TOPIC: Indicators

  2. Indicator • substance that changes color over narrow pH range • Use several indicators to narrow down pH range of substance

  3. Practice using table M1. What indicator is yellow with a pH 9.82. Which indictor is blue with a pH of 5.6 0-3.0 Orange Green Pink Purple Green Green 3.1.-4.4 4.5-14 7.7-14 8.4-14 0-3.7 3.8-5.4 5.5-14 9.7-14

  4. Cabbage Juice – universal indicator • Borax • Distilled water • Tap water • Pickle juice • Vinegar • Baking soda • Lemon juice • Clorox bleach • Shampoo • Windex • Mouth wash • Egg white • Ammonia • Clear soda

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