Complexometric indicator: Difference between revisions

Revision as of 02:36, 4 November 2008

Revision as of 19:56, 8 April 2009

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Some complexometric indicators are sensitive to air and are destroyed. When such solution loses color during titration, a drop or two of fresh indicator may have to be added.

==Examples==

Complexometric indicators are water-soluble organic molecules. Some examples are:

* [[Eriochrome Black T]] for [[calcium]], [[magnesium]] and [[aluminium]]

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* [[2-Cresolphthalexon]]

==Redox indicators==

In some settings, when the titrated system is a redox system whose equilibrium is influenced by the removal of the metal ions, a [[redox indicator]] can function as a complexometric indicator.