Transition Metals: Colours

Question 1

[Cu(H20)4(OH)]

Answer 1

blue ppt

Question 2

[Cu(H2O)2(NH4)4]2+

Answer 2

deep blue solution

Question 3

[CuCl4]2-

Answer 3

yellow solution

Question 4

[Fe(H2O)4(OH)2] (Fe2+)

Answer 4

green ppt

Question 5

[Fe(H2O)3(OH)3] (Fe3+)

Answer 5

orange/brown ppt

Question 6

[Mn(H2O)4(OH)2]

Answer 6

light brown ppt

Question 7

[Cr(H2O)4(OH)2]

Answer 7

grey/green ppt

Question 8

[Cr(NH3)6]3+

Answer 8

purple solution

Question 9

[Cr(OH)6]3-

Answer 9

dark green solution

Question 10

[Cu(H2O)6)2+

Answer 10

blue solution

Question 11

[Fe(H2O)6]2+

Answer 11

pale green solution

Question 12

[Fe(H2O)6]3+

Answer 12

pale yellow solution

Question 13

[Mn(H2O)6]2+

Answer 13

pale pink solution

Question 14

[Cr(H2O)6]3+

Answer 14

violet solution

Question 15

[Cu(H2O)6]2+ + dilute NH3

Answer 15

[Cu(H2O)4(OH)2]

Question 16

[Cu(H2O)6]2+ + conc NH3

Answer 16

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

Question 17

[Cu(H2O)6]2+ + dilute NaOH

Answer 17

[Cu(H2O)4(OH)2]

Question 18

[Cu(H2O)6]2+ + HCl

Answer 18

[CuCl4]2-

Question 19

[Fe(H2O)6]2+ + dilute NH3

Answer 19

[Fe(H2O)4(OH)2]

Question 20

[Fe(H2O)6]2+ + dilute NaOH

Answer 20

[Fe(H2O)4(OH)2]

Question 21

[Fe(H2O)6]3+ + dilute NH3

Answer 21

[Fe(H2O)3(OH)3]

Question 22

[Fe(H2O)6]3+ + dilute NaOH

Answer 22

[Fe(H2O)3(OH)3]

Question 23

[Mn(H2O)6]2+ + dilute NH3

Answer 23

[Mn(H2O)4(OH)2]

Question 24

[Mn(H2O)6]2+ + dilute NaOH

Answer 24

[Mn(H2O)4(OH)2]

Question 25

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

Answer 25

[Cr(H2O)4(OH)2]

Question 26

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

Answer 26

[Cr(NH3)6]3+

Question 27

[Cr(H2O)6]3+ + dilute NaOH

Answer 27

[Cr(H2O)4(OH)2]

Question 28

[Cr(H2O)6]3+ + conc NaOH

Answer 28

[Cr(OH)6]3-