Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemical Changes C4 > Chemical Changes > Flashcards

Chemical Changes Flashcards

1
Q

What is electrolysis?

A

The process of breaking down a compound using electricity.

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

Why must the compound be molten?

A

So the ions can move around freely.

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

Why is cryolite used in the extraction of aluminium?

A

Cryolite lowers the melting point which reduces energy costs.

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

What would form at the anode in the electrolysis of sodium chloride?

A

Chlorine

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

What would form at the cathode in the electrolysis of sodium chloride?

A

Sodium

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

Why would sodium form at the cathode when the compound is aqueous?

A

Sodium is more reactive than hydrogen.

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

What is an anode?

A

The positive electrode which attracts anions that are negative.

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

What is a cathode?

A

The negative electrode which attracts cations that are positive.

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

How much do strong acids ionise in solutions?

A

Fully

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

How much do weak acids ionise in solutions?

A

Partially

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

Describe acid particles within concentrated acids?

A

They have a bigger number per volume of water.

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

Describe acid particles within dilute acids?

A

They have a smaller number per volume of water.

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

What is the proper name for table salt?

A

Sodium chloride

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

What are salts made out of?

A

Ions with an opposite charge.

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

How are salts made?

A

By an acid reacting with a base.

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

What are the three common endings on the end of the salt names?

A

Sulfate, chloride and nitrate

17
Q

Na0H + H2SO4 =

A

Na2SO4 + H2O

18
Q

LiOH + HCl =

A

LiCl + H2O

19
Q

KOH + H2SO4 =

A

K2SO4 + H2O

20
Q

Ca(OH)2 + HNO3 =

A

Ca(NO3)2 + H2O

21
Q

Copper carbonate + nitric acid =

A

Copper nitrate + carbon dioxide + water

22
Q

Sulfuric acid + calcium carbonate =

A

Calcium sulfate + carbon dioxide + water

23
Q

Zinc oxide + sulphuric acid =

A

Zinc sulfate + water

24
Q

Nitric acid + copper oxide =

A

Copper nitrate + water

25
Q

Hydrochloric acid + calcium hydroxide =

A

Calcium chloride + water

26
Q

Magnesium hydroxide + hydrochloric acid =

A

Magnesium chloride + water

27
Q

What is an acid?

A

A chemical which tastes sharp, is corrosive and releases hydrogen ions in water.

28
Q

What is an alkali?

A

A chemical which is corrosive, is used to make soap and releases hydroxide ions in water.

29
Q

What is a base?

A

A chemical which neutralises acid but does not necessarily dissolve in water.

30
Q

What is an indicator?

A

A substance which has a different colour at different pH values.

31
Q

What does neutral mean?

A

Neither acidic or alkaline (pH7)

32
Q

When does neutralisation occur?

A

When an acid is neutralised by an alkali.

33
Q

What is the pH for acids?

A

Between 0 and 7. The more acidic the liquid the lower the pH.

34
Q

What is the pH for alkalis?

A

Between 7 and 14. The more alkaline the liquid the higher the pH.

35
Q

If an alkali of pH 10 was added to an equal amount of acid of pH what would the result be?

A

The solution would be neutral.

36
Q

What metals can be extracted by electrolysis?

A

Potassium, sodium, calcium, magnesium and aluminium.

37
Q

What is the term for something gaining oxygen?

A

It has being oxidised, this is called oxidisation.

38
Q

What is the term for something losing oxygen?

A

It is being reduced, this is called reduction.

39
Q

How does carbon become carbon dioxide?

A

When it takes oxygen from the metal oxide?

Chemical Changes C4 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions