Aim:
To observe a neutralisation reaction.
Equipment:
A test tube, NaOH (Sodium Hydroxide), HCI (Hydrochloric Acid), dropper or dropper bottle, Universal Indicator solution.
Method:
Add about 1-2 mls of Hydrochroic acid and sodium hydroxide to a test tube a mix it by tapping the side of the tube. After that add about 1-3 drops of your universal indicator to the test tube and mix again. Add more acid or base depending on the colour. At the end to should end up with a green neutralised solution in your test tube.
Discussion:
I noticed that a small amount of each solution is enough to dramatically change the colour of the solution. Adding one or two drops of base to a yellowish solution will turn to green. I found that it was kind of hard to mix them in at the start so we had to be patient.
Results:
When and equal quantity of an acid and base are added in to a test tube with a universal indicator it will turn green.
Observation:
I noticed that a small amount of each solution is enough to dramatically change the colour of the solution. Adding one or two drops of base to a yellowish solution will turn to green. I found that it was kind of hard to mix them in at the start so we had to be patient.
Results:
When and equal quantity of an acid and base are added in to a test tube with a universal indicator it will turn green.
Observation:
I noticed that a very little amount of Universal Indicator can go a very long way and you only need about a drop. When we first added our Universal indicator it turned yellow, it was because there was too much acid so we needed to add more base so that the universal indicator and acid could react and turn green.
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