Red Cabbage Indicator 🎨

 Aim: I want to find out how red cabbage can tell if liquid is an acid or a base.

Research: 

Method:

Equipment:

• Acid - Hydrochloric acid
• Base - Sodium Hydroxide
• Red Cabbage
• Water
• Cup/Beaker
• Test tube
• Dropper

Instructions:

1. Wash your hands.
2. Get all of your equipment required.
3. Add water to your cup/beaker.
4. Break the cabbage into small pieces.
5. Mix the red cabbage and water together with the dropper until it starts to turn dark purple. ( The darker the water the better the colours will be)
6.  With the dropper add three drops of the purple water to each test tube.
7. For the first time just add the acid to one of the test tubes and base to another.
8. Gradually add the base and acid to each test tube. 
9. Add as many drops of acid and base to create colours. (Make sure you don't get any of the acid or base on your hands).
10.  Maybe even try to layer the colours on top of each other.

Results:

Discussion: 

Q1 : What is an Acid and a Base?

  A1 :  Acid is a substance that gives hydrogen ion and donates to a substance. When the acid is added to the cabbage water it creates a pigment and changes the colour. Base is a substance that takes the acid. 

 

                    

 Q2 : What do chemical indicators do?

 

  A2: The Chemical indicators creates the chemical reaction. Which makes the colour appear when the acid and base is included in the cabbage water.