61.1 MB (61.0 MB compressed)
5659 x 3772 pixels
48.0 x 32.0 cm ⏐ 18.9 x 12.6 in (300dpi)
SCIENTIFIC PICTURE RESEARCH / SCIENCE PHOTO LIBRARY SCIENTIFIC PICTURE RESEARCH / SCIENCE PHOTO LIBRARY
Chemistry students in an undergraduate teaching laboratory carrying out titration experiments. This 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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