Transition Metals

Question 1

Fe^2+

Colour

Answer 1

Pale green solution

Question 2

Fe^3+

Colour

Answer 2

Pale yellow solution

Question 3

Mn2+

Colour

Answer 3

Pale pink solution

Question 4

[Cu(H2O)6]^2+

Colour

Answer 4

Blue solution

Question 5

Cu^2+

Colour

Answer 5

Blue solution

Question 6

Fe(OH)2

[Fe(H2O)4(OH)2]

Colour + name

Answer 6

Green precipitate

Tetraaquadihydroxoiron(II)

Question 7

Fe(OH)3

[Fe(H2O)3(OH)3]

Name and colour

Answer 7

Orange-brown precipitate

Triaquatrihydroxoiron(III)

Question 8

Mn(OH)2

[Mn(H2O)4(OH)2]

Name and colour

Answer 8

Light brown precipitate

Tetraaquadihydroxomanganese(II)

Question 9

[CuCl4]^-2

Name and colour

Answer 9

Yellow solution

Tetrachlorocuprate(II)

Question 10

Cu(OH)2

[Cu(H2O)4(OH)2]

Name and colour

Answer 10

Blue precipitate

Tetraaquadihydroxocopper(II)

Question 11

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

Colour+ name

Answer 11

Dark blue solution

Tetraamminediaquacopper(II)

Question 12

Cr^3+

Colour

Answer 12

Violet solution

Question 13

Cr(OH)3

[Cr(H2O)3(OH)3]

Name and colour

Answer 13

Triaquatrihydroxochromium(III)

Green-grey precipitate

Question 14

Cr(OH)6

Colour and name

Answer 14

Dark green solution

Hexahyrdoxochromium(III)

Question 15

[Cr(NH3)6]^3+

Name and colour

Answer 15

Purple solution

Hexaamminechromium(III)

Question 16

Fe^2+. +2OH^-

Product

Answer 16

Fe(OH)2

Question 17

Fe^3+ + 3OH^-

Product

Answer 17

Fe(OH)3

Question 18

Mn^2+. +2OH^-

Product

Answer 18

Mn((OH)2

Question 19

[cu(H2O)6]^2+. +4Cl^-

Products

Answer 19

[CuCl4]^2- + 6H2O

Question 20

Cu^2+ + 2OH^-

Product

Answer 20

CU(OH)2

Question 21

If you add small amounts of dilute NH3 to to Cu^2+ it

Answer 21

Acts as a base and you get Cu(OH)2

Question 22

If you add an excess of NH3 to Cu^2+ it

Answer 22

Dissolves the Cu(OH)2 and ligand substitution occurs

Question 23

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

Product

Answer 23

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

Question 24

Cr^3+ +3OH^-

Product

Answer 24

Cr(OH)3

Question 25

If you add excess OH^- to Cr^3+ it

Answer 25

Dissolves the green grey precipitate

Question 26

Cr(OH)3. + 3OH^-

Product

Answer 26

Cr(OH)6^3-

Question 27

If u add dilute NH3 to Cr^3+ it

Answer 27

Acts as a base

Question 28

If you add an excess of concentrate NH3 to Cr^3+

Answer 28

Then ligand substitution occurs

Question 29

[Cr(H2O)6]^3+. +6NH3

Products

Answer 29

[Cr(NH3)]^3+. + 6H2O

Question 30

Convert Fe2+ to Fe3+ using

Answer 30

Acidified potassium manganate (VII)

Question 31

Convert Fe3+ to Fe2+ using

Answer 31

Iodide ions ( I-)

Question 32

Convert the Cr3+ in [Cr(OH)6] to CrO4 2- by

And colour change

Answer 32

Warming with hydrogen peroxide (H2O2)

Dark green to yellow

Question 33

Convert chromate (VI) CrO4 ^2- to dichromate (VI) Cr2O7^2-

And colour change

Answer 33

Add dilute sulfuric acid

Yellow to orange

Question 34

Reduce Cr2O7^2- to Cr^3+

Answer 34

Acidified zinc

Question 35

Reduction of copper to and off white precipitate

Answer 35

Iodide ions form copper(I)iodide

Question 36

Cu^+ spontaneously ……. to produce ….+…….

Answer 36

Disproportionates to Cu and Cu^2+