Leaving Cert Chemistry - Volumetric Analysis

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Volumetric analysis takes place in a wide variety of situations such as in industrial laboratories, hospital laboratories, forensic science laboratories as well as local authority analytical laboratories. Analysis of this kind makes a crucial contribution to many companies and organisations.
Volumetric analysis is a basic chemical technique, using solutions as reactants, that allows us to find out the quantities of substances reacting if the concentration of one of the solutions is known.

In volumetric analysis we carry out reactions using solutions. If we know the of the solution(s) we are using we can find out the of substances reacting. Because this is an extremely sensitive technique, small in technique or measurement can make a difference to the accuracy of the analysis.

The technique used to find the concentration of an solution is called a . In an acid-base titration, a certain of the base is measured out using a of a certain value, e.g. 20 cm3, into a flask and an is added. The is slowly and carefully added to the measured volume of the base using a until the indicator, for example, methyl , just changes colour. This is called the . The indicator is used to show when the base has been completely by the acid.