[saqibjahtemuri]

Hello Member,

I have a querry regarding EDTA acid. Do it exists in solid form ? I have heard that it is not soluble in pH 7 (Water), is it true ?
Secondly, we generally use 2NA-EDTA for generating EDTA ions for chelating purposes. What is the reason of adding salt of EDTA, and what does 2Na deontes, is it two H+ ions replaced by 2 Na+ ions of the EDTA molecule, or what ?
If it is what I mention, than what is the reason of using sodium salt ? Also tell that do this salt behaves as conjugate base = Weak Acid (EDTA) + Strong Base (NaOH) ----> 2Na-EDTA.

I am not a pure chemistry student, but my interests urge me to learn it, I might not understand the complex terminologies you people use.

[Borek]

Solubility of EDTA salts is much higher, plus they dissolve much faster than the pure acid.

EDTA is a tetraprotic acid (often denoted as H₄Y). Disodium salt is Na₂H₂Y.