GCSE Chemistry Required Practical: Titration

Key Stage 4

Meaning

Find the volume of acid needed to neutralise an alkali using Titration.

Method

1. Wash a volumetric pipette and burette with distilled water then wash the volumetric pipette with the 0.1M Sodium Hydroxide and the burette with 0.08M Sulphuric Acid to avoid contamination from previous experiments.
2. Measure 25ml of Sodium Hydroxide using the volumetric pipette.
3. Add the Sodium Hydroxide to a conical flask and then add a few drops of Methyl Orange.
4. Fill the burette with 0.08M Sulphuric Acid.
5. Add the Sulphuric Acid to the Sodium Hydroxide one drip at a time, swirling the conical flask constantly to mix the reactants thoroughly.
6. Repeat until the Methyl Orange turns from yellow to red indicating the solution is Neutral (Chemistry).
7. Record the volume of Sulphuric Acid added to the conical flask.
8. Repeat the experiment at least 3 times to produce an average.