Titration experiments. Students using burettes and conical flasks to carry out acid-base titration experiments. This involves addition of an acid to a
Titration experiments. Students using burettes and conical flasks to carry out acid-base titration experiments. This involves addition of an acid to a base, or vice-versa, with the burette (vertical apparatus) used to measure the volume of a known concentration added to a known volume in the conical flask. Colour changes in the indicator used show when the mixture has reached a neutral pH. This then allows known and measured volumes and the known concentration to be used in a calculation of the unknown concentration in the conical flask. The indicators being used here are phenolphthalein and methyl red.
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