Analytical ChemistryHard
Question
In the precipitation of the iron group in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :
Options
A.decrease concentration of OH- ions
B.prevent interference by phosphate ions
C.increase concentration of Cl- ions
D.increase concentration of NH4+ ions
Solution
Group 3rd radicals are precipitated as hydroxides and the addition of NH4Cl suppresses the ionisation of NH4OH so that only the group 3 cations are precipitated as hydroxides because of their low solubility products.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Which one of the following salts will produce clear and transparent original solution in 2M HCl ?...A white crystalline substance dissolves in water. On passing H2S in this solution, a black precipitate is obtained. The ...Black precipitate of copper sulphide dissolves in :...A gas ′X′ is passed through water to form a saturated solution. The aqueous solution on treatment with silve...Which of the following is a polymer containing nitrogen ?...