Neutralisation

Neutralisation:

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

Aim:                           
To observe a neutralisation reaction.

Equipment: 
A test tube, test tube rack, 1 mol L-1 Na2CO3 (sodium carbonate), 1 mol L-1                                        HCI (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 drops of Universal Indicator solution
  2. Using a dropper bottle, add HCI drop by drop. Be careful because adding                                          even a small amount of extra acid can mean you'll miss the neutralisation point

Observations:            
That the Universal Indicator turned purple-blueish when it was placed in the                                            Ammonium Hydroxide. Bubbles then formed around the rim of the tube as we                                      added the Sulfuric Acid, changing colour from bluish-purple-yellowish-red-                                            pinkish. 


We then did some experimenting to try and make different colours: