PICLAB: IDENTIFICATION TESTS FOR ANIONS Flashcards
Deep (bloody) red solution
SCN- + FeCl3
Turnbull’s blue (Dark green blue)
Fe(CN)6^-3 + FeSO4
Muddy yellow
Fe(CN)6^-3 + CuSO4
BO3^-3 (heat) + conc. H2SO4 + CH3OH
GREEN FLAME
CO3^-2 + conc. H2SO4
EFFERVESCENCE
AsO4^-3 + (NH4)2 MoO4
WHITE PRECIPITATE
CrO4^-2 + Pb(NO3)2
YELLOW PRECIPITATE
CH3COO- + FeCl3
ORANGE SOLUTION
SO4^-2 + Pb(NO3)2
WHITE PRECIPITATE
CONFIRMATORY REAGENTS
- AgCH3COO or AgNO3
ANION
Cl-
CONFIRMATORY REAGENTS
- FeCl3
ANION
SCN-
CONFIRMATORY REAGENTS
- FeSO4
ANION
Fe(CN)6^-3
CONFIRMATORY REAGENTS
- CuSO4
ANION
Fe(CN)6^-3
CONFIRMATORY REAGENTS
- heat + CH3OH + conc H2SO4
ANION
BO3^-3
CONFIRMATORY REAGENTS
- Conc. H2SO4
ANION
CO3^-2
CONFIRMATORY REAGENTS
- (NH4)6 Mo7O24
ANION
AsO4^-3
CONFIRMATORY REAGENTS
- H2O2, conc H2SO4
ANION
CrO4^-2
CONFIRMATORY REAGENTS
- conc H2SO4 & FeCl3
ANION
CH3COO-
CONFIRMATORY REAGENTS
- Pb(NO3)2
ANION
SO4^-2
CONFIRMATORY REAGENTS
- CH3COOH + FeSO4
ANION
NO2-
CONFIRMATORY REAGENTS
- Conc H2SO4 + FeSO4
ANION
NO3-
ANION
Cl- + AgCh3COO or AgNO3
WHITE PRECIPITATE
= AgCl (ins. in HNO3; sol. in NH3)
ANION
- SCN- + FeCl3
BLOOD RED SOLUTION
= FeSCN^2+
ANION
- Fe(CN)6^-3 + FeSO4
VERY BRIGHT BLUE/GREEN (TURNBULL’S BLUE)
= Fe3[Fe(CN)6]2
ANION
- Fe(CN)6^-3 + FeSO4
VERY BRIGHT BLUE/GREEN (TURNBULL’S BLUE)
= Fe3[Fe(CN)6]2
ANION
- Fe(CN)6^-3 + CuSO4
GREENISH WHITE
= Cu3 [Fe(CN)6]2
ANION
BO3^-3 + heat+ CH3OH + conc H2SO4
GREEN BORDERED FLAME
= (CH3)3BO3
ANION
CO3^-2 + conc H2SO4
FORMATION OF BUBBLE (UPON ADDITION)
= CO2 GAS
ANION
AsO4^-3 + (NH4)6 Mo7O24
WHITE PRECIPITATE (SOLUBLE IN HNO3, dissolves upon heating )
= (NH4)3 AsO4 ⚫️ 12M7O24
ANION
CrO4^-2 + H2O2, comic H2SO4
ORANGE/DARK BROWN SOLUTION
= Cr2O7^-2
ANION
CH3COO- + Conc H2SO4
VINEGAR-LIKE ODOR
= CH3COOH
CONFIRMATORY REAGENTS
CH3COO- +FeCl3
ORANGE SOLUTION
= Fe(Ch3COO)3
CONFIRMATORY REAGENTS
So4^-2 +Pb(NO3)2
WHITE PRECIPITATE
= PbSO4
ANION
NO2- + CH3COOH + FeSO4
BROWN RING
= FeNOSO4
ANION
NO3- +conc H2SO4+FeSO4
BROWN RING
= FeNOSO4