Transition Metal ions

Question 1

Colour of:
Cu²+ in [Cu(H2O)6]²+

Answer 1

Blue solution

Question 2

Equation and colour:
[Cu(H2O)6]²+ add NH3 (drops)

Answer 2

Cu²+ + 2OH- > Cu(OH)2

                           Blue solid

Question 3

Equation and colour:
[Cu(H2O)6]²+ add NaOH (drops)

Answer 3

Cu²+ + 2OH- > Cu(OH)2

                           Blue solid

Question 4

Equation and colour:
[Cu(H2O)6]²+ add NH3 (excess)

Answer 4

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

Blue solid

Question 5

Equation and colour:
[Cu(H2O)6]²+ add HCL(drops)

Answer 5

[Cu(H2O)6]²+ + 4Cl- > [CuCl4]²- + 6H2O

Yellow solution

Question 6

Colour of:
Fe²+ in [Fe(H2O)6]²+

Answer 6

Pale Green Solution

Question 7

Colour and equation:
[Fe(H2O)6]²+ add NH3 (drops)

Answer 7

Fe²+ + 2OH- > Fe(OH)2

                      Green  Solid

Question 8

Colour and equation:
[Fe(H2O)6]²+ add NaOH

Answer 8

Fe²+ + 2OH- > Fe(OH)2

                      Green  Solid

Question 9

Colour of:
Fe³+ in [Fe(H2O)6]³+

Answer 9

Yellow Solution

Question 10

Colour and equation:
[Fe(H2O)6]³+ add NH3 (drops)

Answer 10

Fe³+ + 3OH- > Fe(OH)3

                      Brown  Solid

Question 11

Colour and equation:
[Fe(H2O)6]³+ add NaOH

Answer 11

Fe³+ + 3OH- > Fe(OH)3

                      Brown  Solid

Question 12

Colour of:
Mn²+ in [Mn(H2O)6]²+

Answer 12

Pink Solution

Question 13

Colour and equation:
[Mn(H2O)6]²+ add NaOH

Answer 13

Mn²+ + 2OH- > Mn(OH)2
Brown Solid

Question 14

Colour and equation:
[Mn(H2O)6]²+ add NH3

Answer 14

Mn²+ + 2OH- > Mn(OH)2
Brown Solid

Question 15

Colour of:
Cr³+ in [Cr(H2O)6]³+

Answer 15

Violet Solution

Question 16

Colour and equation:
[Cr(H2O)6]³+ add NH3 (Drops)

Answer 16

Cr³+ + 3OH- > Cr(OH)3
Green Solid

Question 17

Colour and equation:
[Cr(H2O)6]³+ add NaOH (Drops)

Answer 17

Cr³+ + 3OH- > Cr(OH)3
Green Solid

Question 18

Colour and equation:
[Cr(H2O)6]³+ add NH3 (Excess)

Answer 18

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

Purple Solution

Question 19

Colour and equation:
[Cr(H2O)6]³+ add NaOH (Excess)

Answer 19

Cr(OH)3 + 3OH- > Cr(OH)6³-
Green Solution

Question 20

Colour of:
CuI (s)

Answer 20

White Solid

Question 21

Colour of:
Cu²+

Answer 21

Colourless solution

Question 22

Colour of:
Cr2O7²-

Answer 22

Orange Solution

Question 23

Colour of:
CrO4²-

Answer 23

Yellow Solution

Question 24

Colour of:
Cu (s)

Answer 24

Brown solid

Question 25

Colour of: MnO4-

Answer 25

Purple solution

Question 26

Colour of: I2 w/ Starch

Answer 26

Blue/Black solution

Question 27

Colour of: Cl2 (aq)

Answer 27

Pale Green Solution

Question 28

Colour of: Br2 (aq)

Answer 28

Orange Solution

Question 29

Colour of: I2 (aq)

Answer 29

Violet Solution