Question

When EDTA solution is added to `Mg^(2+)` ion solution then the incorect statement regarding the reaction will be
A. Four coordinate sites of `Mg^(2+)` are occupied by EDTA and remaining two sites are occupied by water molecules
B. All six coorinate sites of `Mg^(2+)` are occupied
C. pH of the soluiton is decreased
D. Colourless `[Mg-EDTA]^(2-)` chelate is formed

Answer 1

Correct Answer - A
`[H_(2)EDTA]^(2-)+Mg^(2+) rarr [Mg-EDTA ]^(2)+2H^(+)`
(i) In this complex, four donor sites are occupied by oxygen and two donor sites are occupied by hydrogen.
(ii) This complex is six coordinated.
(iii) Complex `[Mg-EDTA]^(2-)` is colourless.
(iv) Increase in `[H^(+)]` decreases pH of the solution