Transition Metal Colours

Question 1

What colour is [Cu(H2O)6]2+?

Answer 1

Pale blue

Question 2

What colour is [Cr(H2O)6]3+?

Answer 2

Violet (pale purple)

Question 3

What colour is [Cu(NH3)4(H2O)2]2+?

Answer 3

Dark blue

Question 4

What colour is Cu(OH)2?

Answer 4

Pale blue ppt

Question 5

What colour is [CuCl4]2-?

Answer 5

Yellow

Question 6

What colour is [Cr(H2O)5SO4]+ ?

Answer 6

Green

Question 7

What colour is [Cr(NH3)6]3+?

Answer 7

Purple

Question 8

What colour is Cr(OH)3?

Answer 8

Grey-green ppt

Question 9

What colour is [Fe(H2O)6]2+/Fe2+?

Answer 9

Pale green

Question 10

What colour is [Fe(H2O)6]3+/Fe3+?

Answer 10

Pale yellow

Question 11

What colour is Fe(OH)2?

Answer 11

Green ppt

Question 12

What colour is Fe(OH)3?

Answer 12

Orange-brown ppt

Question 13

What colour is [Mn(H2O)6]2+/Mn2+?

Answer 13

Pale pink

Question 14

What colour is Mn(OH)2?

Answer 14

Light brown ppt

Question 15

What colour is [Cr(OH)6]3-?

Answer 15

Dark green

Question 16

What colour is aqueous Cr2O72-?

Answer 16

Orange

Question 17

What colour is CuI?

Answer 17

White ppt

Question 18

What colour is I2?

Answer 18

Brown

Question 19

What colour is Cu?

Answer 19

Brown

Question 20

What colour is CuCl?

Answer 20

White ppt

Question 21

What colour are aqueous chromate ions (CrO42-)?

Answer 21

Yellow

Question 22

What colour is [Co(H2O)6]2+/Co2+?

Answer 22

Pink

Question 23

What colour is [CoCl4]2-?

Answer 23

Blue

Question 24

What colour is Cu2O?

Answer 24

Red

Question 25

What colour is CuO?

Answer 25

Black