An organic dye, cousins used to detect the endpoint of precipitation titration by the process of
A
absorption
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B
adsorption
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C
chemical reaction
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D
none of the above
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Solution
The correct option is C adsorption An organic dye, cosine used to detect the endpoint of precipitation titration by adsorption, is called an adsorption indicator. This is also called Argentometry titration.
Argentometry is a type of titration involving the silver(I) ion. Typically, it is used to determine the amount of chloride present in a sample. The sample solution is titrated against a solution of silver nitrate of known concentration. Chloride ions react with silver(I) ions to give the insoluble silver chloride:
Ag++Cl−⟶AgCl(K=5.88×109)
The yellow fluorescein is a common example used for the reaction i.e., -