Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Science > Extended Chemistry > Flashcards

Extended Chemistry Flashcards

0
Q

What is the formula for mole calculations ?

A

Number of moles = mass in (g) (of compound or element)
—————————————————
Mr ( of element or compound

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

An ester is the mix of two things what are they ?

A

Alcohol and carbolic acids

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

When sodium hydroxide is added to a calcium solution, what colour will the precipitate go ?

A

White

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

When sodium hydroxide is added to a copper solution, what colour will the precipitate go ?

A

Blue

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

When sodium hydroxide is added to a iron 3+ solution, what colour will the precipitate go ?

A

Brown

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

When sodium hydroxide is added to a iron 2+ solution, what colour will the precipitate go ?

A

Green

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

When testing for the halide chloride what is the precipitate called and what colour is it ?

A

Silver chloride which is white colour

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

When testing for the halide bromide what is the precipitate called and what colour is it ?

A

Sliver bromide which is cream colour

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

When testing for the halide iodide what is the precipitate called and what colour is it ?

A

Sliver iodide which is yellow colour

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

2 easy ways you can identify hard water

A

1) Doesn’t leather soap very easily.

2) Makes scum

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

Hard water contains two ions

A
  • Magnesium ions

- Calcium ions

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

What is a positive ion called ?

A

Cation

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

What is a negative ion called ?

A

Anion

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

What electrode are cations attracted too?

A

Negative cathode

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

What are are anions attracted too?

A

Positive anode

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

Are electrons lost or gained during an oxidation reaction ?

A

Lost

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

Are electrons lost or gained during an reduction reaction ?

A

Gained

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

What happens to the simplest ion at the anode?

A

It’s discharged

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

If a metal is less reactive than hydrogen what happens at the cathode ?

A

The metal is discharged

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

If the hydrogen is less reactive than the metal, what happens at the cathode ?

A

The hydrogen is discharged

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

During electrolysis what are the half equations at the anode and cathode for copper chloride solution ?

A 
Cathode = Cu2+ + 2e- —> Cu
Anode = 2Cl- —> Cl2 + 2e-
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

During electrolysis what are the half equations at the anode and cathode for copper sulphate solution ?

A 
Cathode = Cu2+ + 2e- —> Cu 
Anode = 2Cl- —> Cl2 + 2e-
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

During electrolysis what are the half equations at the anode and cathode for sodium sulphate solution ?

A 
Cathode = 2H+ + 2e- —> H2 
Anode = 4OH- —> 2H2O + O2 +4e-
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

During electrolysis what are the half equations at the anode and cathode for sodium chloride solution ?

A 
Cathode = 2H+ + 2e- —> H2
Anode = 2Cl- —> Cl2 + 2e-
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
What is electroplating ?
Coating the surface of one metal using another metal, this is done by using electricity.
25
What gases is taken from the air and used in the Haber process?
Nitrogen + Hydrogen
26
What greatly increases the level of nutrients in water ?
Eutrophication
27
What is realised when ammonia is formed?
Heat
28
What happens when you decrease the temperature of the ammonia reaction ?
Increased the rate of the forward reaction.
29
What are titration so used for?
To find out CONCENTRATIONS
30
What type of reaction is a titration?
Neutralisation reaction
31
What is the universal indicator used for during a titration?
To tell you when the reaction has finished.
32
What equation is used to find out the number of moles in a liquid ?
Number of moles = concentration x volume
33
What equation is used to find out the concentration of a substance?
Concentration = moles/volume
34
What does the term 'insoluble' mean?
A substance which does not dissolve.
35
In order to make soluble salts, you can react an acid with what two different reactants?
Insoluble base and soluble base (alkali).
36
By adding copper oxide to hydrochloride acid you make what soluble salt?
Copper chloride
37
What reactant is sodium and potassium? Soluble or insoluble?
Soluble base (alkali)
38
During electroplating what electrode is the object being plated attracted to?
Cathode
39
During the electroplating of a brass cup (NO3-) using a silver bar (Ag+), what is the half equation at the ANODE?
Ag —> Ag+ + e-
40
During the electroplating of a brass cup (NO3-) using a silver bar (Ag+), what is the half equation at the CATHODE?
Ag+ + e- —> Ag
41
Name two uses at electroplating?
1) Decoration | 2) Prevent of Corrosion
42
dm3 is equivalent to how many cm3
1000cm3 ( a litre)
43
1mole of any gas always occupies how many dm3 ?
24 dm3
44
(FILL IN THE GAP) 24dm3 is also know as the _____ _____ of a gas.
Molar volume
45
What is 24dm2 of a gas also known as ?
Molar volume
46
Define the homologous series ?
A group of compounds with the same general formula, one that decries all of the compounds in the group
47
When naming the homologous series what is the 3 names ?
"Meth-" One carbon "Ethe-" Two carbons "Prop-" Three carbons
48
What happens when dynamic equilibrium occur ?
- When the RATE OF FORWARD REACTION is the same as the RATE OF REVERSE REACTION. - There are no observable changes. - Both directions of reactions are happening at the same time.
49
What method is used to concentrate ethonal?
Fractional Distillation
50
The haber process produces what?
Ammonia
51
Which two elements are used to make ammonia?
Nitrogen and hydrogen
52
Ammonia is used to make what for the industry?
Fertilisers
53
(FILL THE GAP) | Fermentation uses yeast to convert ________ into alcohol.
Carbohydrates
54
What process is used to concentrate ethanol?
Fractional distillation
55
Fractional distillation is used to increase the concentration of ethanol above what percentage?
20%
56
Does ethanol have a lower or higher boiling point than water?
Lower
57
What's a pro to fermentation?
It's a renewable resource
58
What is a con of fermentation?
The quality of ethanol isn't good. | It's expensive to concentrate and purify the ethanol.
59
By reacting ethene and water (steam) you produce what?
Ethanol
60
In industry ethanol is made through ethene being reacted with steam. What is a pro to this production of ethanol?
It is fairly cheap. Can be made continuously and quick. It's high quality and needs little further processing.
61
What is a con of ethanol being made by ethene?
Ethene is a non-renewable resource; will start running out. | Will become expensive when it becomes scarce.
62
Ethanol reduces activity of the nervous system. Give two effects this has on people...
TWO OF THE BELOW - increased reaction times - impaired judgment - poor balance - poor coordination - unconsciousness - coma
63
Give two example of why alcohol is bad for society...
- people become addicted to alcohol (alcoholism) - can lead to lairy behaviour and violence - can lead to irresponsible sexual behaviour - drink driving; causes death and serious injury - has economic costs
64
What process can convert ethanol back to ethene?
Dehydration
65
When ethanol is oxidised it creates what?
Ethanoic acid
66
The salts formed from ethanoic acid are called what?
Ethanoates
67
Ethanoic acid + magnesium —> ____________ + __________
Hydrogen + magnesium Ethanoate
68
Ethanoic acid + sodium hydroxide —> __________ + __________
Sodium Ethanoate + water
69
Ethanoic acid + sodium carbonate —> _______ +_______ + _________
Sodium Ethanoate + carbon dioxide + water
70
Alcohol + carboxylic acid —> ______+_______
Ester + water
71
What two purposes are esters commonly used for?
- flavourings | - perfumes
72
Long chain molecules are known as what?
Polymers
73
What three things are made from polyesters?
- plastic bottles - fabric - can be recycled into fleece
74
When an ester reacts with an alkali, you end up with what?
A soap
75
Is the hydroPHOBIC tail of a soap anion attracted to the water or oil?
Grease (e.g oil)
76
Is the hydroPHILIC head of a soap anion attracted to water or grease?
Water
77
What is group 1 in the periodic table called?
The alkali metals
78
What is group 7 in the periodic table called?
The halogens
79
What is group 0 in the periodic table called?
The noble gases
80
What will adding sodium hydroxide (NaOH) do to a solution ?
Change is colour
81
During a flame test Na will show what colour ?
Yellow / Orange
82
During a flame test K will show what colour ?
Lilac
83
During a flame test Cu will show what colour ?
Blue - green
84
During a flame test Ca will show what colour ?
Brick red

Science (5 decks)

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