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Chemistry students performing a titration experiment

Chemistry students performing a titration experiment

C036/9014

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Credit

SCIENTIFIC PICTURE RESEARCH / SCIENCE PHOTO LIBRARY SCIENTIFIC PICTURE RESEARCH / SCIENCE PHOTO LIBRARY

Caption

Chemistry students in an undergraduate teaching laboratory carrying out titration experiments. Postgraduate lab supervisor or demonstrator (in blue lab coat) showing undergraduate student (in white lab coat) how to use a graduated glass pipette with a pipette filler. Titration involves the addition of an acid to a base, or vice-versa, with a 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.

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