Transiton Metals Colours

Really useful diagrams/mindmaps of the colours, reagents, conditions, equations you need to know. Up arrows represent oxidation, down arrows reduction.

HideShow resource information
Preview of Transiton Metals Colours

First 165 words of the document:

NaOH
12
+6 Chromium Cr2O72- CrO42-
1a) R = Zn, C = HCl
11
E = Zn --> Zn2+
orange
acid
yellow
solution H+ solution
1b) R = FeSO4, C = H2SO4(aq)
E = Fe2+ --> Fe3+ 1
1c) R = 1o/2o Alcohol/ Aldehyde
R = H2O2, C = NaOH
C = H2SO4(aq) 4
E = H2O2 --> OH-
NaOH
or
XS NH3 NH3 XS NaOH
Na2CO3
10 9 5 6
+3 [Cr(NH3)6]3+ Cr(OH)3(H2O)3 [Cr(H2O)6]3+ Cr(OH)3(H2O)3 [Cr(OH)6]3-
8 7
acid
acid
purple
green
dark green
green
green
H+ H+
solution
precipitate solution precipitate solution
R = Zn, C = HCl/ absence of air
R = O2 (from air)
2 3 air
E = Zn --> Zn2+ E = O2 --> H2O
+2 [Cr(H2O)6]2+
blue
solution

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Cobalt Co(OH)3(H2O)3 [Co(NH3)6]3+
brown
dark brown
precipitate solution
R = O2,C = NaOH
E = O2 --> 2OH-
R = H2O2, C = NaOH
Slow
E = H2O2 --> OH-
1 R = H2O2, C = NaOH
2
E = H2O2 --> OH-
Conc
NaOH
Fast
HCl or
CoCl42- 7 NH3 XS NH3
3 4
+2 Blue
H 2O 8
[Co(H2O)6]2+ Co(OH)2(H2O)4 [Co(NH3)6]2+
solution 6 5
9
CoCO3 Na2CO3 Pink
acid
Blue
H 2O Straw Yellow
solution H+ precipitate solution
Pink
precipitate…read more

Page 3

Preview of page 3

Here's a taster:

NaOH or NH3
or Na2CO3
7
+3 Iron [Fe(H2O)6]3+ Fe(OH)3(H2O)3
8
Yellow
acid / H+ brown
solution precipitate
2a)R = O2,
E = O2 --> H2O
2b) R = KMnO4,
R = O2,C = NaOH
1a) R = Zn, C = HCl
1 2 C = H2SO4(aq)
E = O2 --> 2OH-
3
E = Zn --> Zn2+ E = MnO4- --> Mn2+
Na2CO3 NaOH or NH3
6 4
+2 FeCO3 [Fe(H2O)6]2+ Fe(OH)2(H2O)4
5
acid
green
Pale green
green
H+
precipitate Solution precipitate
2c) R…read more

Page 4

Preview of page 4

Here's a taster:

Copper
Conc
HCl NaOH
[CuCl4 ]2- 5 or
NH3 XS NH3
1 2
H 2O 6
+2 Yellow green
[Cu(H2O)6]2+ Cu(OH)2(H2O)4 [Cu(NH3)4(H2O)2]2+
solution 4 3
7 acid
CuCO3 Blue
Blue
H 2O Deep Blue
H+
Na2CO3 solution precipitate solution
green
precipitate…read more

Page 5

Preview of page 5

Here's a taster:

Aluminium
NaOH
or
NH3
or
Na2CO3 XS NaOH
1 2
+3 [Al(H2O)6]3+ Al(OH)3(H2O)3 [Al(H2O)2(OH)4]-
4 3
acid
acid
Colourless
H+
White
H+
Colourless
solution precipitate solution…read more

Page 6

Preview of page 6

Here's a taster:

Silver
NH3(aq)
2
[Ag(NH3)2]+ AgCl
Conc
NH3 Cl-
Colourless
White
1
solution 4 precipitate
Used in 5 Br- 3
+1 Photographic [Ag(S2O3)2 ]3- AgBr [Ag(H2O)2]+
fixing S2O32-(aq)
Colourless
Cream
Colourless
solution precipitate I- solution
AgI
yellow
precipitate…read more

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »