Why do we use EDTA in titration to calculate hardness?

Calcium and magnesium salts dissolved in water cause water hardness. Water hardness can be measured using a titration with ethylenediaminetetraacetic acid (EDTA). The ionised form of EDTA is shown on the right. EDTA dissolved in water forms a colourless solution.Click to see full answer. People also ask, why is EDTA used to determine hardness?The EDTA solution can then be used to determine the hardness of an unknown water sample. As EDTA is added, it will complex free Ca2+ and Mg2+ ions, leaving the MgIn– complex alone until essentially all of the calcium and magnesium have been converted to chelates.Furthermore, which is the best method for hardness determination and why? Complexometric titration is one of the best ways of measuring total water hardness. At pH around 10 EDTA easily reacts with both calcium and magnesium in the same molar ratio (1:1). Stability constant of calcium complex is a little bit higher, so calcium reacts first, magnesium later. Just so, how does EDTA titration measure permanent hardness? Determination of Permanent hardness Make up the volume to the original 100 ml by adding distilled water. Now pipette out 20 ml of this solution into a clean conical flask. Then repeat the process of titration steps as mentioned above. Let the burette reading of EDTA be V4 ml.Why EDTA is used in titration?EDTA or Ethylenediaminetetraacetic acid is commonly used as an indicator for complexometric titration because it can act as a ligand which can bind to