1
Q
(Copper I) Cu+
A
Green
2
Q
(Copper II) Cu2+
A
Blue
3
Q
(Copper II ammonia) Cu(NH3)4 2+
A
Blue
4
Q
(Manganese II) Mn2+
A
Pink
5
Q
(Permanganate) MnO4-
A
Purple
6
Q
(Iron II) Iron2+
A
Yellow or green
7
Q
(Iron III) Iron3+
A
Red or orange
8
Q
(Iron III thiocyanate) FeSCN2+
A
Red
9
Q
(Chromium III) Cr3+
A
Green
10
Q
(Chromate ion) CrO4 2-
A
Yellow
11
Q
(Dichromate ion) Cr2O7 2-
A
Orange
12
Q
(Nickel II) Ni2+
A
Green
13
Q
(Cobalt II) Co2+
A
Pink
14
Q
(Hexaaquacobalt) Co(H2O)6 2+
A
Pink
15
Q
(Cobalt chloride) CoCl4 2-
A
Blue
16
Q
BaCO3
A
White
17
Q
CaCO3
A
White
18
Q
What ions are often colored?
A
Ions with unpaired d sublevel electrons (transition metal ions)
19
Q
What ions are colorless?
A
Ions with all paired electrons (Zn2+, Mg2+, Al3+)
20
Q
Metallic sulfides
A
Black or brown
21
Q
Chromate precipitate and/or solids
A
Yellow
22
Q
PbCl2
A
White
23
Q
AgCl
A
White
24
Q
TiO2
A
Wite
25
PhI2
Yellow
26
AgI
Yellow
27
AgCrO4
Red
28
Cu(OH)2
Blue
29
CuO
Black
30
Sulphur
Yellow
31
Na+ flame
Yellow
32
K+ flame
Purple (pink)
33
Ba2+ flame
Green
34
Li+ flame
Red
35
Ca2+ flame
Red
36
Sr2+ flame
Red
37
Cu2+ flame
Blue-green
38
What color do most gases have?
Colorless
39
No2
Brown
40
Cl2
Yellow/green
41
Br2(l)
Orange
42
I- (dissolved in nonpolar solvents)
Dark brown
43
Br- (dissolved in nonpolar solvents)
Dark brown
44
Cl- (dissolved in nonpolar solvents)
Yellow green
45
Phenolphthalein
Colorless --> Pink
46
Bromothymol Blue
Yellow --> Blue
47
Litmus paper
Pink/red --> Blue
SAT Chemistry
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