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Chemistry Basic 6-10

Making a Natural pH Indicator Using Red Cabbage

This experiment shows how red cabbage juice can be used as a natural pH indicator to test whether everyday liquids are acidic, basic, or neutral.

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torontodigits
👨‍🎓 Student Researcher
Step-by-Step Instructions
1
Cut the red cabbage into small pieces
2
Soak it in hot water for 10 minutes
3
Strain the purple liquid into a bowl
💡 Take a moment to observe what's happening before moving to the next step.
4
Pour different liquids into clear cups
5
Add cabbage juice to each cup
6
Observe the color changes
💡 Take a moment to observe what's happening before moving to the next step.
Materials Needed
  • 2–3 red cabbage leaves
  • Hot water
  • Blender or knife
  • Bowl or jar
  • Strainer
  • Clear cups or glasses
  • Test liquids (lemon juice, vinegar, baking soda solution, soap water, plain water)
⚠️ Safety Notes
  • Adult supervision is recommended
  • Be careful when using hot water
  • Do not drink any test liquids
  • Wash hands after the experiment
✅ What You'll Learn
  • Scientific method application
  • Data observation & recording
  • Critical thinking skills
  • Experiment documentation
  • Chemistry concepts
Experiment Status

Status: Published ✓

Submitted: January 5, 2026

Last Updated: January 19, 2026

Difficulty: Basic

Last Saved: Jan 14, 2026 11:29 am

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