What is complexometric titration method?

Complexometric Titration or chelatometry is a type of volumetric analysis wherein the coloured complex is used to determine the endpoint of the titration. Titration is one of the common method used in laboratories which determines the unknown concentration of an analyte that has been identified.

What is complexometric titration examples?

Some examples are: Calcein with EDTA for calcium. Patton-Reeder Indicator with EDTA for calcium with magnesium. Curcumin for boron, that forms Rosocyanine, although the red color change of curcumin also occurs for pH > 8.4.

Why is EDTA used in complexometric titration?

The most common indicators in complexometric titrations are organic dyes which function by forming a colored complex with the metal ion being titrated. During the reaction, EDTA replaces the indicator to form a more stable complex with metal and when the reaction is completed the change for the color is observed.

Why is complexometric titration used?

Complexometric titrations are particularly useful for the determination of a mixture of different metal ions in solution. An indicator capable of producing an unambiguous color change is usually used to detect the end-point of the titration.

What are the uses of complexometric titration?

Complexometric titration is used for the estimation of the amount of total hardness in water. It is widely used in the pharmaceutical industry to determine the metal concentration in drugs. Titanium dioxide is used in many cosmetic products. This can be analysed by complexometric titration.

What is the role of pH in complexometric titration?

Effect of pH: During a complexometric titration, the pH must be constant by use of a buffer solution. Control of pH is important since the H+ ion plays an important role in chelation. Most ligands are basic and bind to H+ ions throughout a wide range of pH.