transition metals colours

Question 1

[Cu(H2O)6]2+

Answer 1

pale blue

Question 2

Cu(OH)2 (s)

Answer 2

pale blue precipitate

Question 3

[Cu(NH3)4(H2O)2]2+

Answer 3

dark blue

Question 4

CuCl4 2-

Answer 4

yellow

Question 5

Cu+

Answer 5

white precipitate

Question 6

Cu2+/Cu

Answer 6

Brown solid (Cu) and blue solution (CuSO4)

Question 7

CoCl4 2-

Answer 7

Blue

Question 8

[Cr(H2O)6]3+

Answer 8

pale purple (turns green on heat)

Question 9

Cr(OH)3 (s)

Answer 9

dark green precipitate

Question 10

[Cr(NH3)6]3+

Answer 10

Purple

Question 11

[Cr(OH)6]3-

Answer 11

dark green

Question 12

Cr2O7 2-

Answer 12

orange

Question 13

CrO4 2-

Answer 13

yellow

Question 14

[Mn(H2O)6]2+

Answer 14

pale pink

Question 15

Mn(OH)2 (s)

Answer 15

pale brown precipitate

Question 16

[Fe(H2O)6]2+

Answer 16

pale green

Question 17

Fe(OH)2 (s)

Answer 17

dark green precipitate

Question 18

[Fe(H2O)6]3+

Answer 18

yellow

Question 19

Fe(OH)3 (s)

Answer 19

Orange/brown precipitate

Question 20

ligand

Answer 20

molecule or ion which donates a pair of electrons to the central metal ion to form a coordinate bond

Question 21

complex ion

Answer 21

transition metal ion bonded to one or more ligands by coordinate bonds

Question 22

coordination number

Answer 22

total number of coordinate bonds formed between a central metal ion and its ligands

Question 23

monodentate ligand

Answer 23

ligand donates just one pair of electrons to the central metal ion to form one coordinate bond

Question 24

bidentate ligand

Answer 24

ligand can donate two lone pairs of electrons to the central metal ion to form two coordinate bonds

Question 25

[Cu(H2O)6 ]2+(aq) + 4NH3(aq)

Answer 25

[Cu(NH3)4(H2O)2]2+ (aq) + 4H2O (l)

Question 26

[Cu(H2O)6]2+ (aq) + 4Cl-

Answer 26

[CuCl4]2- (aq) + 6H2O (l)

Question 27

[Cr(H2O)6]3+ + 6NH3(aq)

Answer 27

[Cr(NH3)6]3+(aq) + 6H2O(l)

Question 28

[Co(H2O)6]2+(aq) + 4Cl-(aq)

Answer 28

[CoCl4]2-(aq) + 6H2O(l)

Question 29

Cu2+ (aq) + 2OH- (aq)

Answer 29

Cu(OH)2 (s)

Question 30

Fe2+(aq) + 2OH-(aq)

Answer 30

Fe(OH)2 (s)

Question 31

Fe(OH)2(s) in air

Answer 31

Fe(OH)3(s)

Question 32

Fe3+(aq) + 3OH- (aq)

Answer 32

Fe(OH)3 (s)

Question 33

Mn2+(aq) + 2OH-(aq)

Answer 33

Mn(OH)2 (s)