Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry > colours to learn 11.2.25 > Flashcards

colours to learn 11.2.25 Flashcards

1
Q

colour of copper sulphate

A

blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

colour of copper oxide

A

black

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

colour of copper carbonate

A

green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

colour of copper metal

A

“pink/orange/brown”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

colour of sulfur

A

YELLOW

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

colour of all salts apart from copper sulfate, copper oxide, copper carbonate

A

WHITE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which 3 salts are not white?
give their colours

A
  • copper sulfate = blue
  • copper oxide = black
  • copper carbonate = green
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

flame test for Li+ ions / lithium ions

A

red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

flame test for Cu^2+ ions / copper (II) ions

A

blue-green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

flame test for K+ ions / potassium

A

lilac

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

flame test for Ca2+ ions / calcium ions

A

orange-red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

flame test for Na+ ions / sodium ions

A

yellow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what colour flame does sulfur burn with

A

blue flame

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what colour flame does magnesium burn with

A

magnesium burns with a BRIGHT WHITE flame

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

hydrogen burns with what colour flame

A

hydrogen burns with a YELLOW / ORANGE flame

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

state the colour change when:
Heating copper carbonate to form copper oxide

A

green to black

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

state the colour change when:
Reducing copper oxide with methane/H2

A

black to orange-brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

state the colour change when:
Adding chlorine water to potassium IODIDE

A

colourless to brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

state the colour change when:
Adding chlorine water to potassium BROMIDE

A

colourless to ORANGE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

state the colour change when:
Adding bromine water to potassium iodide

A

colourless to brown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

chemical test for carbonate ions / (CO3)2-

A

test:
add (any) acid

observation:
effervescence/bubbling/fizzing

22
Q

chemical test for halides

A

add HNO3, then AgNO3 (add nitric acid, then silver nitrate)

23
Q

why is nitric acid added at the start of a halide chemical test

A

to react with any unwanted (carbonate) ions

Without the nitric acid, any carbonate ions present may react with silver nitrate to produce silver carbonate
This would change the colour of the solution and give a false positive result for halide ions (chloride Cl-, bromide Br-, iodide I-)

24
Q

chemical test for chloride ions / Cl-

A

test:
- add HNO3
- then add AgNO3

observation:
- white precipitate

25
chemical test for bromide ions / Br-
test: - add HNO3 - then add AgNO3 observation: - cream precipitate
26
chemical test for iodide ions / I-
test: - add HNO3 - then add AgNO3 observation: - yellow precipitate
27
chemical test for sulfate ions / (SO4)2-
test: - add HCl - then add BaCl2 observation: - white precipitate
28
chemical test for copper (II) ions / Cu2+
test: add sodium hydroxide (NaOH) observation: BLUE precipitate
29
chemical test for iron (II) ions / Fe2+
test: add sodium hydroxide (NaOH) observation: sludgy green precipitate
30
chemical test for iron (III) ions / Fe3+
test: add sodium hydroxide (NaOH) observation: orange-brown precipitate
31
what colour is methyl orange indicator in acidic conditions
red
32
what colour is methyl orange indicator in alkaline conditions
yellow
33
what colour is phenolphthalein indicator in acidic conditions
colourless
34
what colour is phenolphthalein indicator in alkaline conditions
pink
35
what colour is litmus indicator in acidic conditions
red
36
what colour is litmus indicator in alkaline conditions
BLUE
37
universal indicator: pH and colour of a STRONG acid e.g. HCl
pH1-3 - red
38
universal indicator: pH and colour of a weak acid e.g. ethanoic acid
pH 4-6 - orange
39
universal indicator: pH and colour of a neutral substance e.g. water
pH7 - green
40
universal indicator: pH and colour of a WEAK alkali e.g. Na2CO3
pH8-10 - blue
41
universal indicator: pH and colour of a STRONG alkali e.g. NaOH
pH 11-14 - purple
42
colour of chlorine (element)
pale green
43
colour of chlorine in SOLUTION
colourless
44
colour of bromine (element)
RED LIQUID
45
colour of bromine in SOLUTION
orange
46
colour of iodine (element)
dark grey
47
colour of iodine in SOLUTION
brown
48
organic: colour change when adding bromine water to an alkene
orange to colourless
49
organic: colour change when adding acidified potassium dichromate to an alcohol
- produces a carboxylic acid - colour change from ORANGE to GREEN
50
chemical test for chlorine
damp blue litmus paper turns red, then bleaches WHITE
51
chemical test for ammonia
damp red litmus paper goes blue
52
chemical test for water
anhydrous copper sulfate (CuSO4) goes from WHITE to BLUE

Chemistry (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions