radish on wooden cutting board with knife

In the laboratory, chemists use ready-made test sticks (pH indicators) that can change color to determine whether a liquid is acidic. Unfortunately, we don’t have anything like that at home. But we can make our own “test tool”: with radish juice. How does radish juice change color when it comes into contact with liquids with different acidities?

You will need

  • Approximately 140 g radishes
  • Kettle
  • Glass bowl
  • Sieve
  • Scales 
  • Measuring cup
  • Cutting board and knife
  • Empty jam jars
  • Tap water
  • “Test liquids”: dishwashing liquid, citric acid solution, aqueous solution of baking soda

Let’s get started!

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