Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry Topic 1 > Lots Of Stuff > Flashcards

Lots Of Stuff Flashcards

(88 cards)

Start Studying
1
Q

Copper + sulphuric acid –>

A

There is no reaction because copper has a lower reactivity than hydrogen

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

Calcium + water

A

Calcium hydroxide + hydrogen

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

Zinc + steam –>

A

Zinc oxide + hydrogen

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

Aluminium + Sulfuric acid –>

A

Aluminium sulfate + hydrogen

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

Magnesium + nitric acid –>

A

Magnesium nitrate + hydrogen

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

How would you show that a test tube contained hydrogen gas?

A

You would hold a lit splint over/into the test tube and if it makes a popping sound hydrogen is present

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

Zinc + steam –>

A

Zinc oxide + hydrogen

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

Copper oxide can be reduced to copper metal by heating it in a steam of hydrogen gas. Why was the hydrogen passed through for 15 seconds before the gas was lit?

A

To avoid a small explosion between hydrogen and oxygen.

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

What does it mean if there is no further change in mass?

A

The experiment was performed until it was finished and the final mass was achieved.

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

Name two materials that would react together to give hydrogen and which would be suitable for the safe preparation of hydrogen in the lab

A

Zinc and hydrochloric acid

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

Name two materials that would react together to give hydrogen but which would not be suitable for making hydrogen in the lab

A

Potassium and water because the reaction is too explosive

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

Zinc + hydrochloric acid ->

A

Zinc chloride + hydrogen

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

Does potassium react with hydrogen?

A

No, because it is more reaction than hydrogen

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

An excess if magnesium powder was shaken with copper sulphate solution. The solution became colourless and a red brown powder was seen. Name the red power.

A

Copper

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

An excess if magnesium powder was shaken with copper sulphate solution. The solution became colourless and a red brown powder was seen. Name the colourless solution

A

Magnesium sulphate

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

Sodium oxide is heated with copper power. Will there be a reaction?

A

No, because sodium is higher than copper in the reactivity series.

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

What does a fractionating column do?

A

Separate liquids with different boiling points

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

Why is it better to dissolve solid in water in a polystyrene cup rather than a beaker?

A

Less heat escapes from the polystyrene

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

How to prevent a polystyrene cup from being knocked over

A

Place it inside a beaker

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

How can a student check the reliability of the result?

A

They could repeat the test and make sure the results are the same

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

Give a safety precaution a student should take when doing experiments

A

Do not touch a hot (basin) as it could burn you

Wear safety glasses

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

What happens during rusting?

A

The metal reacts with oxygen from the air to form an oxide

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

Write a chemical equation for the decomposition of hydrogen peroxide

A

2H2O2 —> 2H2O + O2

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

What is the test for oxygen

A

Put a glowing splint near the gas and if it relights the gas is oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What name is used for the process in which steam turns into water
Condensation
26
What can be used to test for the presence of wh | water?
Anhydrous copper sulphate - it should turn from white to blue
27
Noble gases are very reactive/unreactive
Unreactive
28
Carbon dioxide + water -->
Carbonic acid
29
Give the acid rain equation
SO2 + H2O --> H2SO3
30
Give two pollutant gases that forms acid rain
Sulphur dioxide and nitrogen dioxide
31
State three problems caused by acid rain
Acid rain can affect lakes by poisoning the fish and plants It also attacks structures made of iron and steel It attacks buildings maybe of limestone and marble
32
State two observations that can be made when magnesium burns in oxygen
The magnesium glows bright white | At the end the magnesium oxide is a white solid
33
Give the chemical equation for the burning of magnesium, in oxygen
2Mg + O2 --> 2MgO
34
When universal indicator is added to magnesium oxide dissolved in water, the indicator turns blue when added to the solution. What does this tell us?
Magnesium oxide is an alkali
35
Describe an experiment to determine the percentage of oxygen in the air
Iron wool is placed at the end of a test tube and the test tube is placed in a beaker of water (upside down.) leave the iron wool until the water stops rising. Oxygen has been used up making iron (111) oxide. Then calculate the percentage of oxygen using this : volume of oxygen divided by total volume in measuring cylinder x 100
36
Give the chemical equation for the reaction of hydrochloric acid with sodium oxide
2Hcl + Na2O --> 2NaCl + H2O
37
Metal + water --->
Metal oxide + hydrogen Or Metal hydroxide + hydrogen (if it is potassium, sodium, lithium, calcium - they are high in the reactivity series and soluble in water)
38
Observations of sodium and cold water
It floats It moves around the surface It fizzes It melts into a silvery ball because the reaction is exothermic
39
Is sodium + water a useful method for preparing hydrogen?
No, the metal is too reactive
40
Observations of potassium with cold water
``` It floats It fizzed It moves around the surface It melts into a silvery ball It burns with a lilac flame ```
41
It potassium and water a useful method for preparing hydrogen?
No, it is too hard to collect the hydrogen and dangerous of extract the metal
42
Observations of calcium with cold water
It bobs up and down It fizzes Not all of the calcium dissolves so it gives us a slightly cloudy/milky solution : Ca(OH)2 is only slightly soluble
43
Does magnesium react with cold water
VERY slowly
44
Observations of magnesium reacting with steam
The magnesium glows bright white White solid remains A colourless gas is collected
45
Metal + acid -->
Salt + hydrogen
46
Salt:
An acid in which the hydrogen has been replaced by a metal
47
Sulfuric acid:
H2SO4
48
Hydrochloric acid
HCl
49
Nitric acid
HNO3
50
Sulfuric acid + metal -->
____ sulfate
51
Hydrochloric acid + metal --->
_____ chloride
52
Nitric acid + metal --->
______ Nitrate
53
What is a catalyst
A substance that speeds up a reaction but remains chemically unchanged
54
Add chromium powder to 50% hydrochloric acid
The solution should fizz and turn green | It produces hydrogen
55
What is the purpose of anhydrous calcium chloride?
It acts as a drying agent
56
Burning hydrogen produces what?
Water
57
How to tell if water is pure?
Boil the liquid - measure boiling point and if it is at exactly 100 degrees Celsius the water is pure
58
Hydrogen is able to remove ______ from certain metal oxides
Oxygen
59
The removal of oxygen by hydrogen is called
Reduction
60
Hydrogen + lead (11) oxide --->
Water + lead
61
Which metal oxides would you expect hydrogen to be able to reduce?
Copper oxide, silver oxide, gold oxide, oxide of any metal below hydrogen
62
Why do you think it is important that the splint id placed in the mouth of a test tube while testing for hydrogen
Oxygen from the air is needed
63
Symbol equation of the reaction of hydrogen and nitrogen to make ammonia
3H2 + N2 --> 2NH3
64
Ammonium:
NH4
65
Ammonia
NH3
66
What is hydrogen used for?
To turn unsaturated days such as vegetable lol into saturated fats such as margarine Oxy-hydrogen flame for welding and cutting Rocket fuel
67
What happens in the decomposition of hydrogen peroxide
When dilute hydrogen peroxide is decomposed, either by heating it of by the use of a catalyst such as manganese oxide, MnO2, oxygen is produced and water it left behind
68
What is the word equation for the decomposition of hydrogen peroxide
Hydrogen peroxide ---> water + oxygen
69
Clean a piece of magnesium using sandpaper. Why?
To remove the magnesium oxide coating
70
Does magnesium oxide dissolve in water? State the pH of the resulting solution and give an equation
Slightly soluble MgO + H2O --> Mg(OH)2 Forms magnesium hydroxide which is a weak alkali Ph 9-11
71
Does carbon dioxide dissolve in water?
Yes - slightly | PH - 6 (weak acid)
72
Two possible equations for the reaction with carbon and oxygen
2C + O2 --> 2CO | C + O2 --> CO2
73
Does sulphur dioxide dissolve in water?
Yes. | Ph-1 (strong acid)
74
Properties of soluble basic (alkaline) oxides
They oxides dissolve in water to form hydroxides They react with acids to form salts They do not react with other alkalis Oxides of this metal are at the top of the reactivity series in group 1 and some group 2 Eg potassium oxide, sodium oxide, calcium oxide
75
Properties of insoluble basic oxides
These oxides do not dissolve in water They react with acids to form salts but do not react with alkalis Oxides of metals low in the reactivity series are of this type Eg copper oxide, iron (111) oxide, silver oxide
76
Is iron soluble in water?
No
77
Properties of acidic oxides
These oxides usually dissolve in water to form acids They react with alkalis to form salts but do not react with other acids Non metal oxides are usually of this type Eg, carbon dioxide, sulphur dioxide
78
Neutral oxides properties
These oxides usually do not dissolve in water They do not react with alkalis to form salts and neither do they react with acids Non metal oxides are usually of this type If a non metal forms two oxides the one with the more oxygen will be more acidic and the one with less more neutral Eg carbon monoxide
79
Percentages of oxygen in air?
Nitrogen 78% Oxygen 21% Argon 0.96% Carbon dioxide 0.03%
80
What is sulphur dioxide produced by
Fossil fuels such as coal
81
Sulphur dioxide can affect people with...
Athsma
82
CaCO3 + H2SO4 -->
CaSO4 + H2O + CO2
83
Nitrogen dioxide can cause
acidic rain
84
The extremely high temperature of a spark caused the nitrogen in the air to
Combine with oxygen
85
Which balancing processes affect the concentration of oxygen?
Respiration (oxygen in) Photosynthesis (oxygen out)
86
What makes the percentage if carbon dioxide rise?
Deforestation Increasing population Burning fossil fuels
87
What effects could an increase in carbon dioxide have?
``` Co2 is a green house gas This causes global warming Sea level rises Climate change Desertification ```
88
What could we do to reduce the concentration of sulphur dioxide and nitrogen oxide
Sulphur dioxide; Use a flue gas Desulfurisation Nitrogen oxides; Cars have catalytic converters which change harmful no2 into co and n2 and co2 Use less motorised transport

Chemistry Topic 1 (1 decks)

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