Study Set Content:
Mercury KI (in neutral solution
soluble in excess KI
Mercury 1 HCl
Add 6N NH₄OH
Mercury Copper foil (no excess HNO₃)
Rubbed surface becomes silvery
Lithium
White ppt that dissolves in NH₄Cl
Potassium
White crystalline ppt.
Ammonium
Pungent odor of NH₃
Copper Ion NH₄OH
Blue ppt
NH₄OH excess
Deep Blue soln
Copper Ion K ferrocyanide TS
Reddish brown ppt
SilverHCl
White ppt. that dissolves
Silver Tollen's Test (HCHO + AgNO₃ + NH₄OH)
Silver mirror
Magnesium Ion Na₂HPO₄ with NH₄Cl + NH₄OH
White crystalline ppt.
Magnesium Ion S&O reagent + NaOH
Blue ppt./lake
Calcium
White ppt. of calcium oxalate
Barium
White ppt. insoluble in HCl and HNO₃
ZincH₂S in presence of CH₃COONa
White ppt
Zinc K₄[Fe(CN)₆]·3H₂O
White ppt. insoluble in 3N HC
Mercury H2S
Black ppt. of HgS
Mercury KI (in neutral solution
Scarlet ppt.
Mercury 1 N NaOH
Black precipitate (after decomposition of Hg₂O)
