Analytical ChemistryHard
Question
Dimethyl gloxime gives a red preipitate with Ni2+, which is used for its detection. To get this precipitate reddily, the best pH range is :
Options
A.< 1
B.2 - 3
C.3 - 4
D.9 - 11
Solution
The reaction indicates that protons are released during reaction. Hence a basic medium is needed to facilitate the reaction. Thus the best pHrange is 9 - 11. If medium is kept acidic then nitrogen atom of the ligand will start donating lone pair to H+ ion of the acid and not to central metal ion.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Select the correct statements with respect to the manganese nitrate solution in water....Which one of the following salts will produce clear and transparent original solution in 2M HCl ?...A solution of colourless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after...KI solution is the reagent for :...An aqueous solution of salt containing an acidic radical X- reacts with sodium hypochlorite in neutral medium. The gas e...