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    Titrations    Titration is a volumetric procedure for determining the concentration of an unknown species by adding a carefully measured volume of a known species that reacts with the unknown .  The   equivalence point in a titration   occurs when the requirements of the balanced equation for reaction are exactly satisfied.  An indicator is used to find the end-point   pf the titration. The end-point is the point where the indicator changes colour. This may not be at the equivalence point       For an acid base titration the equivalence point is the point where neutralisation occurs. Indicators must have the following properties  a! the color change must be sharp. i.e. the indicator must change colour with the addition of one drop  of solution from the burette. b! change colour as close to the equivalence point as possible c! ive a distinct colour change
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