G8 Synthesis and Analysis Titrations

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   accuracy      end-point      indicator      pipette      volumes   
A titration is a method of measuring the of solutions that react with each other. They are quick, convenient, accurate and easy to automate.

Titration Procedure.

A fixed volume is put into a flask. This volume might have been meaured by a or burette.
A couple of drops of are added.
The indicator is chosen because this indicator will change colour quickly when exactly the right amount of acid has been added. There is a sharp change of pH at this point and it is called the .
Another burette is ready with the acid at a known concentration.
The acid is run into the flask a little at a time until the shows that the end-point has been reached.

Sometimes a rough titratin is done first to get an idea of how much acid is needed, then the whole procedure is repeated with high .
Titrations are sometimes done two or three times in order to be sure of an accurate and consistent result.