transition metals and qualitative analysis

Question 1

what is the complex ion solution colour when: Cu2+ in aqueous sol

Answer 1

blue
[Cu(H20)6]2+ (aq)

Question 2

what is the complex ion solution colour when: Fe2+ in aq solution

Answer 2

Pale green (aq)
[Fe(H20)6]2+

Question 3

what is the complex ion solution colour when: Fe3+ in aq sol

Answer 3

yellow
[Fe(H20)6]3+ (aq)

Question 4

what is the complex ion solution colour when: Mn2+ in aq sol

Answer 4

Pale pink
[Mn(H20)6]2+ (aq)

Question 5

what is the complex ion solution colour when: Cr3+ in aq sol

Answer 5

violet
[Cr(H20)6]3+ (aq)

Question 6

what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Cu(H20)6]2+ (aq)

Answer 6

Pale blue ppt
Cu(OH)2(H20)4 (s)

Question 7

what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Fe(H20)6]2+(aq)

Answer 7

Dirty green ppt
Fe(OH)2(H20)4 (s)

Question 8

what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Fe(H20)6]3+ (aq)

Answer 8

Orange ppt
Fe(OH)3(H20)3 (s)

Question 9

what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Mn(H20)6]2+ (aq)

Answer 9

light brown ppt
Mn(OH)2(H20)4 (s)

Question 10

what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Cr(H20)6]3+ (aq)

Answer 10

Green-grey ppt
Cr(OH)3(H20)3 (s)

Question 11

what is the complex ion solution colour when: add excess OH- to Cu(OH)2(H20)4 (s)

Answer 11

Insoluble in excess NaOH

no change

Question 12

what is the complex ion solution colour when: add excess NH3(aq) to Cu(OH)2(H20)4 (s)

Answer 12

[Cu(NH3)4(H20)2] 2+ (aq)
Dark blue solution

Question 13

what is the complex ion solution colour when: add excess NH3(aq) to Fe(OH)2(H20)4 (s)

Answer 13

Insoluble in excess NH3(aq)

no change

Question 14

what is the complex ion solution colour when: add excess NH3(aq) to Fe(OH)3(H20)3 (s)

Answer 14

Insoluble in excess NaOH

no change

Question 15

what is the complex ion solution colour when: add excess NH3(aq) to Mn(OH)2(H20)4 (s)

Answer 15

Insoluble in excess NaOH

no change

Question 16

what is the complex ion solution colour when: add excess NH3(aq) to Cr(OH)3(H20)3 (s)

Answer 16

CR(NH3)6 ^3+ (aq)
Purple solution

Question 17

what is the complex ion solution colour when: add excess OH- to Fe(OH)2(H20)4 (s)

Answer 17

Insoluble in excess NaOH

no change

Question 18

what is the complex ion solution colour when: add excess OH- to Fe(OH)3(H20)3 (s)

Answer 18

Insoluble in excess NaOH

no change

Question 19

what is the complex ion solution colour when: add excess OH- to Mn(OH)2(H20)4 (s)

Answer 19

Insoluble in excess NaOH

no change

Question 20

what is the complex ion solution colour when: add excess OH- to Cr(OH)3(H20)3 (s)

Answer 20

Dark green solution
Cr(OH)6 ^3- (aq)

Question 21

TM OX

coloured ion and ox state: MnO4 -

Answer 21

Mn+7
purple

Question 22

TM OX

coloured ion and ox state: Cr2O7 2-

Answer 22

+6
orange

Question 23

TM OX

coloured ion and ox state: MnO4 2-

Answer 23

+6
green

Question 24

TM OX

coloured ion and ox state: VO2 +

Answer 24

+5
yellow

Question 25

# TM **OX** coloured ion and ox state: VO 2+

Answer 25

+4 blue

Question 26

# TM **OX** coloured ion and ox state: Ti 3+

Answer 26

+3 purple

Question 27

# TM **OX** coloured ion and ox state: V 3+

Answer 27

+3 green

Question 28

# TM **OX** coloured ion and ox state: Cr 3+

Answer 28

+3 violet

Question 29

# TM **OX** coloured ion and ox state: Fe 3+

Answer 29

+3 yellow

Question 30

# TM **OX** coloured ion and ox state: Ti 2+

Answer 30

+2 violet

Question 31

# TM **OX** coloured ion and ox state: V 2+

Answer 31

+2 violet

Question 32

# TM **OX** coloured ion and ox state: Mn 2+

Answer 32

+2 pale pink

Question 33

# TM **OX** coloured ion and ox state: Fe 2+

Answer 33

+2 pale green

Question 34

# TM **OX** coloured ion and ox state: Co 2+

Answer 34

+2 pink

Question 35

# TM **OX** coloured ion and ox state: Ni 2+

Answer 35

+2 green

Question 36

# TM **OX** coloured ion and ox state: Cu 2+

Answer 36

+2 pale blue

Question 37

Transition metal def

Answer 37

A d-block element that can form at least one stable ion with an incomplete d-subshell

Question 38

why can't scandium and zinc be transition elements

Answer 38

do not form at least one stable ion with an incomplete d-subshell

Question 39

Chromium electronic config

Answer 39

1s2 2s2 2p6 3s2 3p6 3d5 4s1

Question 40

copper electronic config

Answer 40

1s2 2s2 2p6 3s2 3p6 3d10 4s1

Question 41

the 4s subshell fills and empties...

Answer 41

before the 3d subshell