Analytical ChemistryHard
Question
Which of the following reagents gives white precipitate with Hg(NO3)2 solution ?
Options
A.Cobalt (II) thiocyanate
B.Tin (II) chloride (excess)
C.Ammonia solution
D.Potassium cyanide solution
Solution
(A) Hg2+ + Co2+ + 4SCN- → Co[Hg(SCN)4↓ (deep blue) ;
(B) 2Hg2+ + Sn2+ + 2Cl- → Hg2Cl2↓ (white) + Sn4+ ; Hg2Cl2 + Sn2+ → Hg ↓ (black) + Sn4+ + 2Cl-
(C) 2Hg2+ + NO3- + 4NH3 + H2O → HgO.Hg(NH2)NO3↓ (white)
(D) KCN no effect i.e. no reaction.
(B) 2Hg2+ + Sn2+ + 2Cl- → Hg2Cl2↓ (white) + Sn4+ ; Hg2Cl2 + Sn2+ → Hg ↓ (black) + Sn4+ + 2Cl-
(C) 2Hg2+ + NO3- + 4NH3 + H2O → HgO.Hg(NH2)NO3↓ (white)
(D) KCN no effect i.e. no reaction.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
If crimson flame is given when an inorganic mixture is tested by flame test, it may be due to the presence of...Bond order of 1.5 is shown by...Co2+ + KCN (not in excess) → precipitate.Select the correct statement(s) with respect to the precipitate....Zinc pieces are added to acidified solution of SO32-. Gas liberated can :...Which of the following statement(s) is/are correct with respect to bromide ions ?...