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Titration experiment. Acid-base titration involves addition of an acid to a base, or vice-versa, with a burette (top) used to measure the volume of a known concentration added to a known volume in a conical flask (bottom). 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.
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