In this experiment I will determine the Calcium content in five different lentils using the Complexometric Titration method with …show more content…
In this experiment a solution containing the free metal ions (Calcium ions) with chelating agent in it will be titrated against a MgCl2 solution. The end point of titration is determined by adding Eriot Black T Indicator, since it forms a colored complex with free metal ions the addition of this turns the color of solution turns blue which is turned into Pink/Violet as the end point of titration is reached.
Figure 1: Showing the Chemical structure of EDTA Figure 2: Showing how EDTA bonds with the Calcium ions. Images taken: http://www.chm.bris.ac.uk/motm/edta/edtah.htm, https://en.wikipedia.org/wiki/Nitrilotriacetic_acid
Research Question:
The determination of Calcium content in Five different Lentils using Complexometric Titration with Ethylenediaminetetraacetic acid (EDTA).
Variables:
Independent Variable:
1) The type of Lentil used ( Split Bean, Split Mung Bean, Brown Lentils, Red Lentils, Yellow Beans) Dependant Variable:
1) Calcium content in every bean/Lentil.
2) Amount of MgCl2 added will dependent on the type of Lentils/Bean
Controlled