End Of Year Chemistry Flashcards
1
Q
What number does the ph scale go from
A
0 to 14
2
Q
Anything with a ph below 7 is an…
A
Acid
3
Q
The strongest acid has a ph of what
A
0
4
Q
Anything with a above 7 is an…
A
Alkali or a base
5
Q
That strangest alkali has a ph of…
A
14
6
Q
What is an indicator
A
Something that changes colour depending of whether it is an acid or an alkali
7
Q
What is a popular indicator
A
Litmus paper
8
Q
What colour do acids turn on litmus paper
A
Red
9
Q
What colour does alkalis turn on litmus paper
A
Blue
10
Q
What is a universal indicator
A
A solution that is a very useful mixture of dyes which gives the colours shown in a ph chart
11
Q
Is sulphuric acid an acid or an alkali and is it strong or weak
A
It is an acid and it is strong
12
Q
Is acid rain a strong or weak acid
A
Weak
13
Q
What is water in the ph scale
A
7- neutral
14
Q
Is sodium hydroxide an acid or an alkali and is it strong or weak
A
An alkali and it is strong
15
Q
Acids react with alkalis to form a what
A
A neutral solution
16
Q
What do the ph scale show
A
The strength of acid and alkalis
17
Q
What is chemistry
A
The study of reactions and structure of particles and molecules
18
Q
True or false there is an inner and outer cone on a flame
A
True
19
Q
What is it called that the Bunsen burner sits on
A
Heat resistant tile
20
Q
How many types of flames are there
A
3
21
Q
What are the types of flames
A
Safety flame blue flame and roaring flame
22
Q
What temp does water boil at
A
100 degrees
23
Q
Salt water boiled at what temp
A
105 degrees
24
Q
Does ink have a higher or lower boiling point than water
A
Ink had a higher boiling point
25
What is crude oil
It is a thick black viscous liquid that floats on water
26
What is oil composed of
A very large mixture of hydrocarbons
27
What does oil refining involve
The separation of these hydrocarbons into mixtures (fractions)
28
Can liquids in a mixture be separated
Yes if they have different boiling points
29
What is light gasoline used for
Petrol
30
What is naphtha used for
Petrol and white spirits
31
Kerosene is used for what
Jet fuel paraffin
32
What is gas fuel for
Diesel central heating oil
33
What is distillation
The separation of liquids with multiple boiling points this liquid is often crude oil
34
What is distillation
The separation of liquids based on their boiling points
35
What is are 2 advantage of oil
It is found in many places in the world and crude oil is separated into many components each of which has a use
36
State 2 disadvantages of oil
Accidents such as oil spills occur and much of our oil had to be imported
37
How can you separate two or more soluble solids of a solution
Distill and evaporation
38
What are compounds
Chemicals made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction
39
What is a mixture
Is made from molecules of elements and compounds that are simply mixed together without chemical bonds
40
What techniques can be used to separate mixtures
Filtration chomography evaporation and distillation
41
What is a base
A substance with a ph scale higher than seven
42
What is chemistry
The study of reactions and structure of particles and molecules
43
True or false there is an inner and outer cone on a flame
True
44
What is it called that the Bunsen burner sits on
Heat resistant tile
45
How many types of flames are there
3
46
What are the types of flames
Safety flame blue flame and roaring flame
47
What temp does water boil at
100 degrees
48
Salt water boiled at what temp
105 degrees
49
Does ink have a higher or lower boiling point than water
Ink had a higher boiling point
50
What is an alkali
A base that dissolves in water
51
What colour did acid drop turn with the universal indicator
Red
52
What colour did indigestion power turn with the universal indicator
Dark green
53
What colour did the sodium hydroxide solution turn with the universal indicator
Dark purple
54
Acids make a light or dark colour when universal indicator is added
Light
55
Alkalis make a light or dark colour when universal indicator is added
Dark
56
What is the test for hydrogen
The flame test: a flame is inserted into a gas jar
57
What is a positive result for the hydrogen test
A pop noise is heard and a flame maybe seen
58
What does neutral mean in terms of of ph
7.0
59
What is the equipment called that the Bunsen burner goes on top of
Tripod
60
I put my solution in my ...... Flask
Conical
61
What an acidic compound dissolves in water it produces..……
Hydrogen H+
62
What an alkaline compound dissolves in water it produces..……
Hydroxide ions OH-
63
Acids react with alkalis to form....... This is called what
Salts and neutralisation reaction
64
Hydrochloric acid + sodium hydroxide equals what
Sodium chloride + water
65
Why must charcoal be added to the reaction mixture in the neutralisation experiment
To remove colour pigment
66
When lithium hydroxide reacts with sulphuric acid you get what
Lithium sulphate + water
67
What equipment is used to separate particles of a solid from a liquid
A funnel and filter paper
68
Sand can be obtained from a mixture of sand and sea water by
Filtration
69
Diesel can be obtained from crude oil by
Fractional distillation
70
Pure water can be obtained from a salt solution by
Distillation
71
Salt can be obtained from a salt solution by
Evaporation
72
What is an solution
a mixture of a solvent and a solute
73
What is a solvent
A liquid in which a solute dissolves
74
What is a solute
A substance that dissolves in a solvent
75
What is boiling
When a substance reaches boiling point
76
What is evaporating
Going from a liquid to a gas happens at Room temperature
77
In chromatography what should the line where to ink spots are placed be drawn with and why
A pencil because no ink to prevent contamination
78
A substance which turns one colour in acid and another in alkali is called a
Indicator
79
Litmus turns what colour in an acid and what colour in an alkali
Red in acid and blue in alkali
80
Something that is neither an acid or an alkali is said to be....
Neutral
81
What ph would you expect from sulphuric acid
Ph = 2-4
82
What ph would be expected from sodium hydroxide
11-14
83
What is the ph for grapefruit juice
3.1
84
What is the ph for ethanoic acid
3.0
85
What is the ph for dilute hydrochloric acid
1.0
86
In nature carbon dioxide is created by organism which undertake what
Respiration
87
Calcium carbonate + hydrochloric acid equals what
Calcium chloride + carbon dioxide + water
88
What is the test for carbon dioxide
Bubble carbon dioxide through limewater
89
What is a positive result for the carbon dioxide test
Turning milky white
90
In nature oxygen is created by plants doing what
photosynthesising
91
In nature the formula for oxygen is Carbon dioxide + water equals what
Glucose + oxygen
92
In the lab the formula for hydrogen peroxide equals what
Water + oxygen
93
The test for oxygen is what
The glowing splint test we insert a glowing splint into the gas produced
94
What is a positive result for the oxygen test
The splint reignites
95
How much percentage is nitrogen
79%
96
How much percentage is oxygen
20%
97
How much percentage is carbon dioxide
0.03%
98
What is the percentage for other gases
1%
99
What is a saturated solution
A solution that can have no more solid dissolves in it
