Transition elements colours Module 5

Question 1

What colour is Fe(2+) aq / {Fe(H2O)6}2+

Answer 1

Pale green solution

Question 2

What colour is Fe(3+) aq / {Fe(H2O)6}3+

Answer 2

Yellow solution

Question 3

What colour is Fe(OH)2

Answer 3

Pale green precipitate

Question 4

What colour is Fe(OH)3?

Answer 4

Orange-Brown precipitate

Question 5

What colour is Cu(2+) / {Cu(H2O)6}(2+)?

Answer 5

Pale blue solution

Question 6

What colour is {Cu(NH3)4(H2O)2}2+?

Answer 6

Dark blue solution

Question 7

What colour is {CuCl4)2-?

Answer 7

Yellow solution

Question 8

What colour is Cu(OH)2?

Answer 8

Pale blue precipitate

Question 9

What colour is Cr(3+) / {Cr(H2O)6}(3+)?

Answer 9

Purple solution

Question 10

What colour is {Cr(H2O)5(SO4)}+?

Answer 10

Green solution

Question 11

What colour is Cr2+ / {Cr(H2O)6}2+?

Answer 11

Blue solution

Question 12

What colour is {Cr(NH3)6}3+?

Answer 12

Purple solution

Question 13

What colour is {Cr(OH)6}3-?

Answer 13

Dark green solution

Question 14

What colour is Cr2O7 (2-)?

Answer 14

Orange solution

Question 15

What colour is Mn(2+)?

Answer 15

Pale pink solution

Question 16

What colour is MnO4-?

Answer 16

Purple solution

Question 17

What colour is Mn(OH)2?

Answer 17

Light brown precipitate