PICLAB: IDENTIFICATION TESTS FOR ANIONS

Question 1

Deep (bloody) red solution

Answer 1

SCN- + FeCl3

Question 2

Turnbull’s blue (Dark green blue)

Answer 2

Fe(CN)6^-3 + FeSO4

Question 3

Muddy yellow

Answer 3

Fe(CN)6^-3 + CuSO4

Question 4

BO3^-3 (heat) + conc. H2SO4 + CH3OH

Answer 4

GREEN FLAME

Question 5

CO3^-2 + conc. H2SO4

Answer 5

EFFERVESCENCE

Question 6

AsO4^-3 + (NH4)2 MoO4

Answer 6

WHITE PRECIPITATE

Question 7

CrO4^-2 + Pb(NO3)2

Answer 7

YELLOW PRECIPITATE

Question 8

CH3COO- + FeCl3

Answer 8

ORANGE SOLUTION

Question 9

SO4^-2 + Pb(NO3)2

Answer 9

WHITE PRECIPITATE

Question 10

CONFIRMATORY REAGENTS
- AgCH3COO or AgNO3

Answer 10

ANION
Cl-

Question 11

CONFIRMATORY REAGENTS
- FeCl3

Answer 11

ANION
SCN-

Question 12

CONFIRMATORY REAGENTS
- FeSO4

Answer 12

ANION
Fe(CN)6^-3

Question 13

CONFIRMATORY REAGENTS
- CuSO4

Answer 13

ANION
Fe(CN)6^-3

Question 14

CONFIRMATORY REAGENTS
- heat + CH3OH + conc H2SO4

Answer 14

ANION
BO3^-3

Question 15

CONFIRMATORY REAGENTS
- Conc. H2SO4

Answer 15

ANION
CO3^-2

Question 16

CONFIRMATORY REAGENTS
- (NH4)6 Mo7O24

Answer 16

ANION
AsO4^-3

Question 17

CONFIRMATORY REAGENTS
- H2O2, conc H2SO4

Answer 17

ANION
CrO4^-2

Question 18

CONFIRMATORY REAGENTS
- conc H2SO4 & FeCl3

Answer 18

ANION
CH3COO-

Question 19

CONFIRMATORY REAGENTS
- Pb(NO3)2

Answer 19

ANION
SO4^-2

Question 20

CONFIRMATORY REAGENTS
- CH3COOH + FeSO4

Answer 20

ANION
NO2-

Question 21

CONFIRMATORY REAGENTS
- Conc H2SO4 + FeSO4

Answer 21

ANION
NO3-

Question 22

ANION
Cl- + AgCh3COO or AgNO3

Answer 22

WHITE PRECIPITATE
= AgCl (ins. in HNO3; sol. in NH3)

Question 23

ANION
- SCN- + FeCl3

Answer 23

BLOOD RED SOLUTION
= FeSCN^2+

Question 24

ANION
- Fe(CN)6^-3 + FeSO4

Answer 24

VERY BRIGHT BLUE/GREEN (TURNBULL’S BLUE)
= Fe3[Fe(CN)6]2

Question 25

ANION - Fe(CN)6^-3 + FeSO4

Answer 25

VERY BRIGHT BLUE/GREEN (TURNBULL’S BLUE) = Fe3[Fe(CN)6]2

Question 26

ANION - Fe(CN)6^-3 + CuSO4

Answer 26

GREENISH WHITE = Cu3 [Fe(CN)6]2

Question 27

ANION BO3^-3 + heat+ CH3OH + conc H2SO4

Answer 27

GREEN BORDERED FLAME = (CH3)3BO3

Question 28

ANION CO3^-2 + conc H2SO4

Answer 28

FORMATION OF BUBBLE (UPON ADDITION) = CO2 GAS

Question 29

ANION AsO4^-3 + (NH4)6 Mo7O24

Answer 29

WHITE PRECIPITATE (SOLUBLE IN HNO3, dissolves upon heating ) = (NH4)3 AsO4 ⚫️ 12M7O24

Question 30

ANION CrO4^-2 + H2O2, comic H2SO4

Answer 30

ORANGE/DARK BROWN SOLUTION = Cr2O7^-2

Question 31

ANION CH3COO- + Conc H2SO4

Answer 31

VINEGAR-LIKE ODOR = CH3COOH

Question 32

CONFIRMATORY REAGENTS CH3COO- +FeCl3

Answer 32

ORANGE SOLUTION = Fe(Ch3COO)3

Question 33

CONFIRMATORY REAGENTS So4^-2 +Pb(NO3)2

Answer 33

WHITE PRECIPITATE = PbSO4

Question 34

ANION NO2- + CH3COOH + FeSO4

Answer 34

BROWN RING = FeNOSO4

Question 35

ANION NO3- +conc H2SO4+FeSO4

Answer 35

BROWN RING = FeNOSO4