Lithium precipitating agent
NaOH(alkalanizer) + Na₂CO₃
Potassium
Sodium bitartrate
Ammonium
1N NaOH
Silver
TOLLENS tesT (HCHO +AgNO3+ NH4OH)
Copper Ion
NH₄OH
NH₄OH excess
K ferrocyanide TS
Silver
HCl
Magnesium
NH₄Cl + NH₄OH(no result)
Magnesium
S&O reagent + NaOH
Calcium
NH4)2C2O4
Barium
H₂SO₄ (2N)
Zinc
H₂S(catalyst)in presence of CH₃COONa
Zinc
K₄[Fe(CN)₆]·3H₂O
Mercury
H₂S
KI (in neutral solution
1 N NaOH
1 HCl
KI TS
Copper foil (no excess HNO₃)
Cadmium
H₂S
Lithium CONFIRMATORY
Add NH₄Cl to dissolve ppt.
Potassium
Soluble in 6N NH₄OH, alkali hydroxides and carbonates
Ammonium
Red to blue litmus; ammonia odor
Silver HCl
AgCl (white ppt.) + NH₄OH → [Ag(NH₃)₂]
Calcium
Insoluble in HAc, soluble in HCl
Zinc H₂S in presence of CH₃COONa
Add HAc (ppt. insoluble), dissolves in 3N HCl