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Color Changing Lemonade: Diffusion & pH Indicators

Explore the behavior of particles in liquids and changes in color due to pH by making a lemonade that changes color.

-

grade:

6

10

time:

2-6 class periods

active lab time:

20

minutes

objectives:

- Explain what diffusion is on a macroscopic and particulate level
- Use pH indicators to explore principles of pH, learn about the pH scale, and identify the pH of common kitchen substances

science concepts:

solutions, states of matter, acids and bases

essential questions:

- How do particles behave and move in liquids and why?
- How and why do butterfly pea flowers change color?
- What are natural pH indicators and why are they useful?

how did it go?

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