Neutralisation

Aim - To observe a neutralisation reaction

Equipment
- Test Tube
- Test Tube Rack
- Hydrochloric acid
- Sodium Hydroxide
- Dropper
- Universal Indicator

Method -
- Add approximately 1-2 ml of Sodium Hydroxide and place the test tube into the test tube rack. Add 3-5 drops of universal indicator
-  Using a dropper bottle, add Hydrochloric acid drop by drop. Be extra careful because adding even a small amount of extra acid can mean you'll miss the neutralisation point.

Results -
After adding the hydrochloric acid we noticed that the solution had immediately turned green and after we mixed it in it had turned yellow. We then added a few more drops of sodium hydroxide which turned the solution dark blue. Afterwards, we added more hydrochloric acid and finally made green, which meant that the solution had become neutralised.





Discussion -
When we added the universal indicator we realised that we needed to put in more solution as the colour was very translucent. As we added in the hydrochloric acid we noticed the solution had changed drastically, instead of being a dark blue it had turned a warm yellow which was surprising. We then played with it a bit more until we finally found the neutralisation point which was lime green. We weren't that happy with that colour so we played with it a bit more until we were happy with the colour. it was a slightly darker green but we liked it more than the green we had before.

Conclusion -
The experiment was a success as we had figured out how to create a neutralised solution which had equal parts of acids and base. This was a fun experiment as we could play with the solution however we wanted and see the different colours it could become. It was a fun experiment and I would do it again.