Appendix G (confirmatory tests lng)

Question 1

identify the cation

Canary yellow ppt when 1 drop 0.1 M KI is added

Answer 1

Ag⁺

chem formula: AgI

Question 2

Identify the cation

yellow ppt when 1 drop of 0.1 M KI is added?

Answer 2

Pb²⁺

Question 3

Identify the cation

greenish yellow ppt when 0.1 M KI is added

Answer 3

Hg₂²⁺

Question 4

Identify the cation

white ppt when 3 drops 1M NaOH & 3 drops of 0.1 M NaCl is added

Answer 4

Bi³⁺

Question 5

Identify the cation

reddish brown ppt when 3 drops of 6M CH₃COOH and 2 drops of 0.1M K₄Fe(CN)₆

Answer 5

Cu²⁺

Question 6

Identify the cation

white ppt when 2 drops of 0.1M K₄Fe(CN)₆ is added

Answer 6

Cd²⁺

Question 7

Identify the cation

scarlet red ppt when 1 drop of 0.1M KI is added

Answer 7

Hg²⁺

Question 8

Identify the cation

black ppt when 2 drops of 0.1M HgCl₂ is added

Answer 8

Sb³⁺

Question 9

Identify the cation

red surface is produced when 2 drops of distilled water, 3 drops of 6M NH₄OH, and 1 drop of aluminon reagent is added

Answer 9

Al³⁺

Question 10

Identify the cation

blue ethereal layer is produced when added with 3 drops of 3% H₂O₂, 3 drops of conc. H₂SO₄, and 4 drops of acetone

Answer 10

Cr³⁺

Question 11

Identify the cation

white ppt when 2 drops of 0.1M K₄Fe(CN)₆ is added

Answer 11

Zn²⁺

Question 12

Identify the cation

turnbull’s blue ppt when 2 drops of 0.1M K₄Fe(CN)₆ is added

Answer 12

Fe²⁺

Question 13

Identify the cation

blood red sol’n when 2 drops of 0.1M KSCN is added

Answer 13

Fe³⁺

Question 14

Identify the cation

azure blue sol’n when 2 drops of 1M NH₄SCN & 4 drops of acetone is added

Answer 14

Co²⁺

Question 15

Identify the cation

cherry red ppt when 1 drop of conc NH₄OH & 3 drops of C₄H₈N₂O₂ (alcoholic dimethylglyoxime) is added

Answer 15

Ni²⁺

Question 16

Identify the cation

yellow ppt when 1 drop of 0.1M K₂CrO₄ is added

Answer 16

Ba²⁺

Question 17

Identify the cation

yellow ppt when 1 drop of 0.1M K₂CrO₄, 1 drop of 1M NH₄OH, and 1 drop of 95% ethanol is added

Answer 17

Sr²⁺

Question 18

Identify the cation

white ppt when 1 drop of 0.1M K₂C₂O₄ is added

Answer 18

Ca²⁺

Question 19

Identify the cation

pale yellow crystals when 3-5 drops of zinc uranyl acetate solution is added

Answer 19

Na⁺

Question 20

Identify the cation

brown ppt when one drop of 6M NaOH and 2 drops of Nessler’s reagent is added

Answer 20

NH₄⁺

Question 21

Identify the anion

white ppt when 6M HNO₃ and 2 drops of 0.1M AgNO₃ is added

Answer 21

Cl^-

Question 22

Identify the anion

reddish brown layer when 10 drops of CH₂Cl₂ (DCM), 2 drops of 6M H₂SO₄, and 0.1M KMnO₄ (dropwise w/ shaking) is added

Answer 22

Br^-

Question 23

Identify the anion

purple layer when 10 drops of CH₂Cl₂ (DCM), 2 drops of 6M H₂SO₄, and 0.1M KMnO₄ (dropwise w/ shaking) is added

Answer 23

I^-

Question 24

Identify the anion

blood red sol’n when 2 drops of 0.1 FeCl₃ is added

Answer 24

SCN^-

Question 25

Identify the anion

Prussian blue when 2 drops of 0.1 FeCl₃ is added

Answer 25

Fe(CN)₆^4-

Question 26

Identify the anion

black color when a drop of S^2- is placed on a silver coin after standing for 2 mins

Answer 26

S^2-

Question 27

Identify the anion

brown ring when 3 drops of 6M CH₃COOH, 0.1M FeSO₄ (added slowly on sides of tube) is added

Answer 27

NO₂^-

Question 28

Identify the anion

reddish brown ppt when 3 drops of HgCl₂ is added

Answer 28

CO₃^2-

Question 29

Identify the anion

CaC₂O₄ is produced when added w/ 3 drops of 0.1M CaCl₂

Answer 29

C₂O₄^2-

Question 30

Identify the anion

silver mirror is produced when 3 drops of 0.1M AgNO₃ sol’n and 5 drops of 6M NH₄OH is added then heated in a water bath until visible result is obtained

Answer 30

C₄H₄O₆^2-

Question 31

Identify the anion

silver mirror is produced when 3 drops of 0.1M AgNO₃ sol’n and 5 drops of 6M NH₄OH is added then heated in a water bath until visible result is obtained

Answer 31

C₆H₅O₇^3-

Question 32

Identify the anion

yellow ppt is produced when 3 drops of ammonium molybdate reagent is added with 6M HNO₃ then stirred then mixture is heated on a water bath for 2-3 mins

Answer 32

PO₄^3-

Question 33

Identify the anion

loss of purple color when 1 drop of 0.1M KMnO₄ w/ 5 drops of water & 2 drops of 6M H₂SO₄ is added

Answer 33

S₂O₃^2-

Question 34

Identify the anion

blye ethereal layer when 3 drops of 3% H₂O₂, 3 drops of conc. H₂SO₄, and 4 drops of acetone is added

Answer 34

CrO₄^3-

Question 35

identify the anion

brown ring is produced when 2 drops of conc. H₂SO₄ & 0.1M FeSO₄ (slowly ulet sa sides ng tube) is added

Answer 35

NO₃^-

Question 36

Identify the anion

white ppt when 5 drops of 0.1M KNO₃ is heated in a water bath then after heating, 2 drops of 6M HNO₃ & 1 drop of 0.1M AgNO₃ is added

Answer 36

ClO₃^-

Question 37

identify the anion

white ppt is produced when 1 drop of 0.1M Pb(CH₃COO)_2</sub

Answer 37

SO₄^2-