Question

In edta method, buffer solution is added to maintain ph value

Answer 1

yes it is mixed with it to make the ph in control

Answer 2

Yes, it is true that the role of buffer solution is to maintain a constant pH value throughout the chemical process in EDTA titration method, which is used to find out the hardness of water.

Generally, buffer solution of ammonium chloride that has high pH value of about 10 is used.

EDTA cannot dissolve in low pH, so there is need to moderate pH and maintain the value.

More details:

EDTA is Ethylenediamine tetraacetic acid.

It has 4 carboxylic acids and 2 amines.

It is helpful in chelating process.