Neutralisation

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

Matterials

• 2 pipetts
• Hydrocloric acid
• Sodium hydroxide
• Test tube rack
• Test tubes
• Neutraliser

Method

1. Take a test tube rack with 1 boiling tube at each end of the rack and 4 test tubes.
2. Quarter fill  the boiling tube at one end with Sodium hydroxide
3. Quarter fill  the boiling tube at one end with Hydrocloric acid
4. fill each test tube with 5 drops of univeral indicator 
5. using the pipettes slowly drop in different amounts of sodium hydroxide and hydrocloric acid into the indicator to make each colour
6. make sure you dont mix the pipettes

We managed to get every colour apart from yellow