transition metal colours i cant remember

Question 1

[Cu(Cl4)] 2-

Answer 1

yellow

Question 2

[Cr(H2O)6] 3+

Answer 2

purple

Question 3

[Cr(OH)3(H2O)3]

Answer 3

green

Question 4

[Cr(OH)6]3-

Answer 4

dark green

Question 5

[Fe(H2O)6]2+

Answer 5

green

Question 6

[Fe(H2O)4(OH)2]2+

Answer 6

green

Question 7

[Fe(H2O)6]3+

Answer 7

yellow

Question 8

[Fe(H20)3(OH)3]

Answer 8

orange/ brown

Question 9

[Co(H20)6] 2+

Answer 9

pale pink

Question 10

[Cu(OH)2(H2O)4] (S) with excess NH3

Answer 10

4NH3 > [Cu (NH3)4(H2O)2] 2+ +2H20 + 2OH-, ligand substitution

Question 11

[Cr(H2O)3(OH)3] with excess NH3

Answer 11

6NH3 > [Cr (NH3)6] 3+ + 3H2O + 3OH-