Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Year 9 Chemistry > Topic 2 Reactions, NEED FOR YEAR 10 > Flashcards

Topic 2 Reactions, NEED FOR YEAR 10 Flashcards

1
Q

State 3 things oxygen is used for

A
  • welding torches
  • rocket fuel
  • breathing apparatus in hospitals
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Chemical tests for combustion products:

Water:

Carbon dioxide

A

Water- presence of water turns anhydrous copper sulfate from white to blue

Carbon dioxide- turns limewater milky

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

What is the equation for the preparation of oxygen?

A

Hydrogen peroxide + manganese dioxide -> water + oxygen

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

What is the test for oxygen?

A

We proved oxygen had been produced by using a glowing splint which relights.

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

What are the results (observations) of the oxygen test?

A

Bubbles of gas can be seen and the test tube empties.

When the glowing splint is put into the mouth of the test tube it relights

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

What is the conclusion of the oxygen test?

A

Oxygen is prepared by the decomposition of hydrogen peroxide

To speed this reaction up we used manganese dioxide. Manganese dioxide is a catalyst.

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

What is the definition of a catalyst?

A

A catalyst is a chemical that speeds up a reaction without being used up itself.

.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Fill in the blanks:

Oxygen is a….. And……. Gas. It makes up….of the mixture called air.

A

1-colourless
2-odourless
3-21%

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

What is hydrogen used for?

A

Making margarine
Clean fuel
Rocket fuel

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

List 2 properties of hydrogen

A

Hydrogen is a colorless and odourless gas.

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

What is the equation for the preparation of hydrogen?

A

Magnesium + Hydrochloric Acid → Magnesium Chloride + Hydrogen

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

What is the test for hydrogen?

A

The test for hydrogen is using a lighted splint, you will hear a squeaky pop.

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

What are the results (observations) when testing for hydrogen?

A

Heat given out
Bubbles of gas produced
SQUEAKY POP with a lighted splint

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

What is the conclusion when testing for hydrogen?

A

Hydrogen can be prepared by an acid with a metal.

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

How many people could the Hindenburg carry?

A

72

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

What year did the Hindenburg crash?

A

1937

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

What voyage did the Hindenburg disaster strike on?

A

It’s 63rd voyage

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

What gas was the Hindenburg filled with?

A

The hydrogen

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

List 2 properties of carbon dioxide

A

Carbondioxide is a colourless and odourless gas.

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

List some uses of carbon dioxide

A

Fizzy drinks
Fire extinguisher
Dry Ice

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

What is the equation for the carbon dioxide test?

A

Calcium carbonate + Hydrochloric acid → Calcium chloride + Water + Carbon Dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the results (observations) for the carbon dioxide test?

A

Bubbles of gas
Metal carbonate disappears to give a clear solution
Lime water turns milky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Fill in the blanks:

Carbon dioxide can be prepared easily by reacting a….. carbonate with…..

A

Metal

Acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the test and the result for:
Oxygen
Hydrogen
Carbon dioxide

A

Oxygen:
Test-glowing splint
Result-relights

Hydrogen:
Test-lighted splint
Result-squeaky pop

Carbon dioxide:
Test-bubble into limewater
Result-limewater turns milky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What do endothermic reactions do?
Take in heat
26
What is an example of an endothermic reaction?
An example of an endothermic reaction is sherbet dissolving on your tongue
27
What is an exothermic reaction?
It's gives out heat
28
What is an example of an exothermic reaction?
An example of an exothermic reaction is burning a piece of wood
29
What is the definition of thermal decomposition?
Thermal decomposition is the BREAKING DOWN of a chemical using HEAT energy.
30
What is the equation of the thermal decomposition of copper carbonate?
``` Heat Copper carbonate (green) ---> copper oxide (black) + carbon dioxide ``` This reaction is endothermic
31
When does an oxidation reaction occur?
When a chemical reacts with oxygen
32
When does reduction occur?
Occurs when a substance loses oxygen
33
What is a reducing agent
a substance which reduces another substance
34
What is a redox reaction?
A reaction in which REDUCTION AND OXIDATION takes place together.
35
What is the thermite reaction equation?
iron(III) oxide + aluminium → aluminium oxide + iron
36
What percent of the air is nitrogen
78%
37
What percent of the air is argon
0.9%
38
What percent of the air is Co2
0.037%
39
Give the word equation for respiration
Sugar+oxygen->carbon dioxide + water (+energy)
40
Name the 2 products of the reaction when candle wax combusts
Water | Carbon dioxide
41
What is candle wax made up of
Of substances containing carbon and hydrogen
42
What are the chemicals required in the preparation of oxygen
Hydrogen peroxide and manganese dioxide
43
Give 2 examples of industrial catalysts
Iron and platnium
44
What is an enzyme
Enzymes are soluble protein molecules that can speed up chemical reactions in cells
45
Name some of the chemical reactions that enzymes are involved in
Respiration, photosynthesis and making new proteins
46
What are the chemicals required in the preparation of hydrogen
Hydrochloric acid and magnesium
47
What are the chemicals required in the preparation of carbon dioxide
Calcium carbonate and hydrochloric acid
48
What is the risk assessment in the prep of oxygen, hydrogen and carbon dioxide
Wear eye protection
49
Is hydrogen less dense than air
Yes
50
Is oxygen less dense than air
No
51
Is carbon dioxide less dense than air
No
52
Do you use and upward delivery with hydrogen
Yes
53
Do you use an upward delivery with oxygen
No
54
Do you use an upward delivery with carbon dioxide
No
55
Is hydrogen denser than air
No
56
Is oxygen denser than air
Slightly
57
Is carbon dioxide denser than air
Yes
58
Do you use a downward delivery with hydrogen
No
59
Do you use a downward delivery with oxygen
Yes
60
Do you use a downward delivery with carbon dioxide
Yes
61
What is hydrogens solubility in water
Very low
62
What is oxygens solubility in water
Low
63
What is carbon dioxides solubility in water
Low
64
Hydrogen overwater?
Yes
65
Oxygen overwater?
Yes
66
Carbon dioxide overwater?
Yes
67
What is the definition of oxidation
Addition of oxygen
68
What is the definition of reduction
Removal of oxygen
69
What is the definition of a redox reaction
Reduction and oxidation both taking place in reaction
70
What is being reduced and what is being oxidised in this equation: Calcium+magnesium oxide->calcium oxide+magnesium
Calcium -> calcium oxide is oxidised | Magnesium oxide->magnesium is reduced
71
What colour is copper oxide
Black powder
72
What colour is carbon
Black powder
73
Rusting equation
Iron +oxygen + water --> hydrated iron oxide
74
Burning a fuel equation
Fuel + oxygen ---> carbon dioxide + water (+energy)
75
``` Composition of air: What percentage of air is; Oxygen Nitrogen Argon Carbon dioxide ```
Oxygen - 21% Nitrogen - 78% Argon - 0.9% Carbon dioxide - 0.037%
76
Give 4 physical properties of oxygen
Colourless, odourless gas, not very soluble on water, same density as air
77
Give the word equation for respiration
Sugar + oxygen ---> carbon dioxide + water (+energy)
78
Describe a chemical test for water
Use the chemical anhydrous copper sulfate which changes colour from white to blue in presence of water
79
What chemicals are required in the preparation of oxygen
Hydrogen peroxide Catalyst manganese dioxide
80
Give three examples of industrial catalysts.
Vanadium (V) oxide Platinum Iron
81
What is an enzyme
Enzymes are soluble protein molecules that can speed up chemical reactions in cells
82
Name some of the chemical reactions that enzymes are involved in.
DNA replication, protein synthesis, digestion
83
What is the special ingredient in ‘bio’ or ‘biological’ powders?
Biological enzyme
84
If there is a stain on someones shirt and the stain is removed by a 40° wash with ace bio powder, why was the stain not removed at a 70° and cold wash with ace bio powder
Not used at optimum temperature
85
What chemicals are required in the preparation of hydrogen
Magnesium Hydrochloric acid
86
What gas are modern airships filled with
The gas was helium
87
Which nation were the first masters of airship technology and what were they used for?
Germany and the airships were used as bombers in the First World War
88
What were airships developed for after 1918
They were designed for passenger flights
89
What was Germany's biggest airship called
The Hindenburg
90
What happened to the airship in 1937
The airship exploded and crashed
91
What was the chemistry of the Hindenburg disaster
Hydrogen reacted with oxygen
92
How many people died due to the Hindenburg disaster
36
93
What does the NASA scientist think caused the Hindenburg explosion
The airship was charged with static electricity and the flammable paint caught fire
94
What chemicals are required in the preparation of carbon dioxide
Hydrochloride acid and marble chips
95
Give two physical properties of carbon dioxide
Gas | Colourless / odourless
96
If in an experiment the initial temperature of a substance is 20° and the final temperature is 26°, what type of reaction has taken place
Exothermic
97
If in an experiment the initial temperature of a substance is 22° and the final temperature is 18°, what type of reaction has taken place
Endothermic
98
If in an experiment the initial temperature of a substance is 21° and the final temperature is 31°, what type of reaction has taken place
Exothermic
99
If in an experiment the initial temperature of a substance is 22° and the final temperature is 35°, what type of reaction has taken place
Exothermic
100
If in an experiment the initial temperature of a substance is 20° and the final temperature is 18°, what type of reaction has taken place
Endothermic
101
In an experiment we find out what happens when zinc is added to copper sulphate solution, give three pieces of evidence that tell you a chemical reaction is taking place. REMEMBER THE TEMPERATURE BEFORE WAS 18° AND THE TEMPERTAURE AFTER IS 25°
Temperature increases Powder disappears and brown sludge appears Liquid changes colour
102
``` Which of the following terms could be used to describe the reaction when zinc is added to copper sulphate solution, explain your answer: Exothermic Oxidation Decomposition Endothermic ```
Exothermic as the temperature increases during the reaction
103
What is being reduced and what is being oxidised in this equation: Zinc oxide + hydrogen ----> zinc + water
Zinc oxide is being reduced | And the hydrogen is oxidised
104
What is being reduced and what is being oxidised in this equation: Aluminium oxide + potassium ---> aluminium + potassium oxide
Aluminium is being reduced | Potassium is being oxidised
105
Fill in the gaps: In the Thermite reaction, the two reactants are........ and.......... The Thermite reaction is a very............ reaction as it gives out lots of heat. The reactant............... is reduced to molten iron. This reaction was used to.......train tracks together.
``` Iron oxide Aluminium Exothermic Iron oxide Weld ```
106
After you have completed the practical heating a mixture of copper oxide and carbon answer the following questions: A) What colour is copper oxide B) what colour is carbon C) what do you see when you heat the mixture D) what do the contents of the boiling tube look like after heating E) write an equation for the reaction F) why is this reaction a redox reaction
A) black powder B)black powder C) mixture glows orange and has given off D) coppery coloured, solid produced E) copper oxide + carbon --> copper + carbon dioxide F) The copper oxide is reduced to copper and the carbon is oxidised to carbon dioxide

Year 9 Chemistry (6 decks)

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