COLOURS Flashcards
(145 cards)
1
Q
Iron(II) metal ion
A
Green, turns orange/brown when left exposed due to oxidation
2
Q
Iron (III) metal ion
A
Orange brown
3
Q
Copper (II) metal ion
A
Blue
4
Q
Compound to add when don’t know if the substance is iron (II) or iron(III) nitrate?
A
NaOH
If green, will be iron (II) if orange brown, will be iron(III)
5
Q
zinc (II) when added NaOH
A
White ppt
6
Q
zinc (II) when added NaOH in excess
A
Ppt redissolves
7
Q
Calcium (II) when added NaOH
A
White ppt
8
Q
Calcium (II) when added NaOH in excess
A
No change
9
Q
Al (III) when added NaOH
A
White ppt
10
Q
Al (III) when added NaOH in excess
A
White ppt redissolves
11
Q
zinc (II) when added dilute ammonia
A
White
12
Q
Calcium (II) when added dilute ammonia
A
None formed
13
Q
Al (III) when added dilute ammonia
A
White
14
Q
Zn (II) when added dilute ammonia in excess
A
Redissolves
15
Q
Calcium (II) when added dilute ammonia in excess
A
No ppt
16
Q
Al (III) when added dilute ammonia in excess
A
No change
17
Q
Lithium flame test
A
Red
18
Q
Sodium flame test
A
Yellow orange
19
Q
Potassium flame test
A
Lilac
20
Q
Calcium flame test
A
Brick red
21
Q
Barium flame test
A
Apple green
22
Q
strontium flame test
A
Crimson
23
Q
Copper flame test
A
Green-turquoise
24
Q
Magnesium flame test
A
No colour
25
Beryllium flame test
no colour
26
NH3 gas test
Red litmus paper turns blue
27
Ca(OH)2 ppt colour
White ppt
28
Ba(OH)2 ppt colour
Colourless
29
NO2 fumes colour
Brown fumes
30
Limewater when CO2 present
Cloudy
31
Fluorine gas colour
Pale yellow gas
32
Chlorine gas colour
Pale green gas
33
Bromine liquid colour
Dark red liquid
34
Iodine solid colour
Black, but readily sublimes to form purple vapour.
35
Chlorine in water
Almost colourless, faintly green
36
Bromine in water
Yellow orange
37
Iodine in water
Brown
38
Chlorine in hexane
Almost colourless
39
Bromine in hexane
Orange red
40
Iodine in hexane
Pink/violet
41
Hydrogen halides dissolve in water to produce acids, what colour does the blue litmus turn?
red
42
Fluoride ion ppt colour
None
43
Chloride ion ppt
White
44
Bromide ion colour
Cream
45
Iodide ion colour
Yellow
46
AgCl with ammonia
Dissolved colourless solution.
47
AgBr and ammonia colour
ppt Unchanged
48
AgBr in conc ammonia
Gives colourless solution
49
AgI and ammonia
Doesn’t dissolve
50
AgI with conc ammonia
doesnt dissolve
51
Test for alkene
Br water decolourised from brown to colourless.
52
Ignition of alkene
Very sooty. Orange flame
53
Ignition of alkanes
No soot visible. Yellow
54
bromide with alkane
Yellow. Br colour still there
Darker yellow when in the dark
55
bromine with alkene
colourless
56
Potassium manganate and sulfuric acid with alkane
Purple
57
Potassium manganate and sulfuric cid with alkene
Purple-orange-colourless
58
Potassium dichromate solution with solution hat oxidised
Orange to green
59
Colour high is given when fehlings solution tests for an aldehyde
Blue to red
60
VO2+ +5 colour
Yellow
61
VO^2+
| +4
Blue
62
V3+
| +3
Green
63
V2+
| +2
Violet
64
Acronym for vanadium colours
+5, +4, +3, +2
Y, B, G, V
You better get vrooming
65
(Fe(H2O)6)^2+ colour
Pale green
66
(Fe(H2O)6)^3+ colour
Yellow brown
67
(Cu(H2O)6)^2+ colour
Blue solution.
68
(Cu(H2O)5OH)^+ colour
Blue solution.
69
(Cu(H2O)4(OH)2)
Blue ppt
70
(Cu(NH3)4(H2O)2)^2+
Deep blue ppt
71
(Cu(H2O)4(OH)2)
Blue ppt
72
(CuCl)^-2
Yellow
73
Cobalt colour 2+
Pink
74
Fe 2+ colour
Green
75
Fe 3+ colour
Yellow
76
C 2+ colour
Blue
77
Cr 3+ colour
Green
78
Cr 6+ colour
Yellow and orange
79
V 2+colour
Violet
80
V 3+ colour
Green
81
V 4+ colour
Blue
82
V 5+ colour
Yellow
83
(Co(H2O)6)^2+ colour
Pink
84
(Co(H2O)4(OH)2)
Blue ppt, pink ppt
85
Cr 3+ in NaOH
Green thick
86
Mn 2+ in NaOH
Buff very runny
87
Fe 2+ in NaOH
Dark green very thick
88
Fe 3+ in NaOH
Red
89
Ni 2+ in NaOH
Pale green
90
Cu 2+ in NaOH
Dark blue
91
Co 2+ in NaOH
Buff
92
Zn 2+ in NaOH
Cream.
93
Cr 3+ in NH3
Green
94
Mn 2+ in NH3
Buff
95
Fe 2+ in NH3
Dark green
96
Fe 3+ in NH3
Orange
97
Ni 2+ in NH3
Pale green
98
Cu 2+ in NH3
Light blue
99
Co 2+ in NH3
Blue
100
Zn 2+ in NH3
White
101
Which transition ions dissolve in excess NaOH?
Cr 3+ and Zn 2+
102
Which transition metals change in excess NH3?
Ni 2+, Cu 2+, Co 2+, Zn 2+.
103
Ni 2+ colour change with excess NH3
Green to Lavender blue solution
104
Cu 2+ change in excess NH3
Light blue ppt dissolves to form royal blue solution
105
Co 2+ change with excess NH3
Blue ppt dissolves and gets brown oxidise solution
106
Zn2+change with excess NH3
White to colourless
107
Phenolphthalein colour when alkali
Pink
108
Phenolphthalein colour when acidic
Colourless
109
Methyl orange colour when acidic
Red
110
Methyl orange when alkali
Yellow
111
Potassium manganate colour
Purple
112
Potassium manganate in acidic
Nearly colourless
113
Starch colour when there’s a little bit if iodine
Blue black solution
114
Iodine in solution potassium iodine
Dark brown
115
Iodine reacted with sodium thiosulfate
Nearly colourless
116
(Cu(EN)2)^2+
Purple/violet
117
(Cu(edta)^-2
Blue
118
Colour changes of Cr when potassium dichromate and sodium hydroxide is added
Orange to yellow
119
Cr colour change when sulfuric acid added to the solution ade from Cr and potassium dichromate and NaOH
Orange
120
Potassium dichromate and sulfuric acid and zinc powder, what colours will appear?
Orange to grey, to blue to grey
121
Potassium dichromate and sulfuric acid with hydrogen peroxide
Yellow, to green/brown to green.
122
Test for alkenes, adding potassium manganate
Purple to colourless
123
Test for alcohols, adding PCl5
Steamy fumes, HCL gas. Blue litmus turns red..
124
Test for alcohol, adding H2SO4 and potassium dichromate
Orange to dark green.
| If tertiary, no reaction
125
Test for aldehydes, fehings
Goes brick red ppt.
126
Test for aldehyde Tollens
Silver mirror ppt
127
Test or carboxylate acids, pH paper
Orange to dark green if weak acid present
128
Test for c acids if add sodium carbonate powder
Effervescence. Bubbles, limewater turns milky due to CO2 given off.
129
Cyclohexene when it reacts with bromine in the dark
HBr decolorises.
130
Benzene with bromine in the dark
No reaction with br alone. If add iron filings as catalyst, will decolourise bromine and HBr fumes evolve.
131
Benzene with potassium manganate
No reaction
| Ring is too stable
132
Benzene with hydrogen over nickel catalyst
One mole absorbs3 moles of H at 150 degree. Shows its got 3 double rings?
133
Benzene with conc HNO3 and H2SO4
Substitution reaction, yellow oil formed.
| Nitrobenzene formed
134
Phenol with pH
Orange to red
135
Phenol with sodium hydrogencarbonate
White ppt. Slight reaction
136
Phenol with NaOH
Dissolves easily
137
Phenol with HCL
Steamy fumes and oily layer
138
Phenol reaction with Na
Effervescence H2 Gas
139
Phenol with Br
Colour decolourises
| White ppt
140
Phenol with iron III chloride
Purple solution. Ethanol, no change
Can be used to test between phenol and ethanol
141
Ammonia with pH
Very deep blue
142
Ammonia with evaporation of water
Crystals also eventually.
143
Ammonia with copper sulphate solution
Deep blue when added.
144
Amines with copper sulphate
Deep blue gelatinous
145
Phenylamine with copper II sulphate
Green solid
