Today in science class we tried to make the colours in the rainbow using a universal indicator, hydrocloric acid and sodium hydroxide. here is what happened
- 2 pipetts
- Hydrocloric acid
- Sodium hydroxide
- Test tube rack
- Test tubes
- Neutraliser
Method
- Take a test tube rack with 1 boiling tube at each end of the rack and 4 test tubes.
- Quarter fill the boiling tube at one end with Sodium hydroxide
- Quarter fill the boiling tube at one end with Hydrocloric acid
- fill each test tube with 5 drops of univeral indicator
- using the pipettes slowly drop in different amounts of sodium hydroxide and hydrocloric acid into the indicator to make each colour
- make sure you dont mix the pipettes
We managed to get every colour apart from yellow
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