Comploximetric titration of different metals

Types of EDTA titration

•-Direct titration: the solution containing the metal ion to be determined is buffered to be the desired pH and titrated directly with standard DETA.

Back titration:Use for the substance which are not water soluble or determined substance and titrant can be too slow.

https://www.youtube.com/watch?v=J91n8RUkhKc

Determination of magnesium using

eriochrome black T indicator •1 -Dilute 10 ml of the magnesium ion solution to 50 ml with

distilled water.•2 -add 3 ml of the buffer solution (pH= 10) and EBT indicator

3 -titrate with EDTA solution The color changes from red to blue

Determination of unknown Mg⁺⁺ solution using EBT indicator

•M.V(Mg)= MV(EDTA)

•M of Mg =

•