Transition Metals Colours

Question 1

[Cu(H₂O)₆]²⁺ (II)

Answer 1

Blue solution

Question 2

[Cu(OH)₂(H₂O)₄] (II)

Answer 2

Blue precipitate

Question 3

[Cu(NH₃)₄(H₂O)₂]²⁺ (II)

Answer 3

Dark blue solution

Question 4

[CuCl₄]²⁻ (II)

Answer 4

Yellow solution

Question 5

[Fe(H₂O)₆]²⁺ (II)

Answer 5

Pale green solution

Question 6

[Fe(OH)₂(H₂O)₄] (II)

Answer 6

Green precipitate

Question 7

[Fe(H₂O)₆]³⁺ (III)

Answer 7

Yellow solution

Question 8

[Fe(OH)₃(H₂O)₃] (III)

Answer 8

Orange precipitate

Question 9

[Mn(H₂O)₆]²⁺ (II)

Answer 9

Very pale pink solution

Question 10

MnO₂ (IV)

Answer 10

Black precipitate

Question 11

[Mn(OH)₂(H₂O)₄] (II)

Answer 11

Light brown precipitate

Question 12

[Cr(H₂O)₆]³⁺ (III)

Answer 12

Violet solution

Question 13

[Cr(OH)₆]³⁻ (III)

Answer 13

Dark green solution

Question 14

[Cr(OH)₃(H₂O)₃] (III)

Answer 14

Grey/green precipitate

Question 15

[Cr(H₂O)₅SO₄]⁺ (III)

Answer 15

Green solution

Question 16

[Cr(NH₃)₆]³⁺ (III)

Answer 16

Purple solution

Question 17

CrO₄²⁻ (VI)

Answer 17

Orange/yellow solution

Question 18

MnO₄²⁻ (VI)

Answer 18

Green solution

Question 19

MnO₄⁻ (VII)

Answer 19

Purple solution

Question 20

[Ti(H₂O)₆]²⁺ (II)

Answer 20

Violet solution

Question 21

[Ti(H₂O)₆]³⁺ (III)

Answer 21

Purple solution

Question 22

[V(H₂O)₆]²⁺ (II)

Answer 22

Violet solution

Question 23

[V(H₂O)₆]³⁺ (III)

Answer 23

Green solution

Question 24

VO²⁺ (IV)

Answer 24

Blue solution

Question 25

VO₂⁺ (V)

Answer 25

Yellow solution

Question 26

[Co(H₂O)₆]²⁺ (II)

Answer 26

Pink solution

Question 27

[Co(OH)₂(H₂O)₆] (II)

Answer 27

Blue precipitate

Question 28

[Co(Cl)₄]²⁻ (II)

Answer 28

Blue solution

Question 29

[Ni(H₂O)₆]²⁺ (II)

Answer 29

Green solution