Neutralisation {experiments}

14/05/18

A chemical reaction occurs when you mix together an acid and a base. the base cancels out the effects of the acid. The reaction is called a neutralization reaction because a neutral solution is made if you add just the right amount of acid and base together.

Aim:
To observe a neutralization reaction.

Equipment:
A test tube, test tube rack, 1 mol L-1 Na2CO3 (sodium carbonate), 1 mol L-1 HCl (hydrochloric acid), dropper or dropper bottle, universal indicator solution.

Method:

1) Add approximately 1-2 mL of Na2CO3 and place the test tube into the test tube rack. Add 3-5 drops of universal indicator solution.

2) Using a dropper bottle, add HCl drop by drop. Be careful because adding even a small amount of extra acid can mean you'll miss neutralization point.

Observation:
The universal indicator helps with changing of colours. The amount of hydrochloric acid(HCl) added helps with maintaining the colour wanted. We worked on making the rainbow colours(ROYGBIV). By adding acid we had created red orange and yellow and by adding (Na2Co3) Sodium carbonate which is a base, we created blue, indigo and violet. Adding both solutions we created green which is neutral.