Neutralisation

 Aim: To observe a neutralisation reaction. 

Method: 

- Get a test tube rack, 6 test tubes, acid, base and universal indicator.

- Fill 4 test tubes with 3mL of acid.

- Fill 2 test tubes with 3mL of base.

- Add a squirt of universal indicator to each.

- Add different amounts of acid and base to make the colours of the rainbow (ROYGBIV). 

Results:

Red bottle: acid

Blue bottle: base

Black bottle behind the test tubes: UI (universal indicator).  

Discussion: As you can see from the results, we have made a rainbow using bases and acids forgot to mention the UI (universal indicator) ROYGBIV is what we used to determine the scale of pH such as Red a strong acid, green neutral which means water and finally indigo a strong base, neutralisation is when acid and base fight/mix together so that they can form into the green zone (to make is a pH of 7) that is what we did in the photo you see above, in the Base, there are hydroxide ions (OH-)  and in the acid, there are hydrogen ions (H+). We had to add more or less of the opposing side (base & acid) to make these colours, and now I will tell you the pH scale of all of these colours shown in the picture, Orange/yellow 2 - 5 pH scale and blue/indigo 8 - 12.

Conclusion: In the end, we got pretty solid colours in our test tubes, our results were pretty colourful, unfortunately, we couldn't do violet because our equipment wasn't strong enough so we could only make ROYGBI, but next time I could try and make the colour violet in one of the test tubes.