Analytical ChemistryHard
Question
To a solution of a substance, gradual addition of ammonium hydroxide results in a brownish black precipitate which does not dissolve in excess of NH4OH. However, when KI (not in excess) is added to the original solution, a green precipitate is formed. The solution contained :
Options
A.Lead salt
B.Silver salt
C.Mercurous salt
D.Copper salt.
Solution
Hg2Cl2 + 2NH3 → 
+ NH4Cl
Hg22+ + 2I- → Hg2I2 ↓ (green)
+ NH4ClHg22+ + 2I- → Hg2I2 ↓ (green)
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
What product is formed by mixing the solution of K4 [Fe(CN)6] with the solution of FeCl2 in complete absence of air ?...To avoid the precipitation of hydroxides of Ni2+, Co2+, Mn2+ along with those of the third group cations, the solutions ...Select the correct statement with respect to Ca2+ ions....In a test tube containing a salt, a few drops of dilute $H_{2}{SO}_{4}$ was added, which gave colourless vapours having ...Chromyl chloride vapours are dissolved in water and acetic acid and barium acetate solution is added, then:...