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: 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. 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.
Results:
Discussion: The Universal Indicator mixed with the hydrochloric acid and sodium carbonate to create a different colour based on the pH levels from red (acid) to violet (base).
Conclusion: We created and observed neutralisation. We also made them react in the form of a rainbow (ROYGBIV). Red being most acidic and violet being the most basic.
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