Brainscape's Knowledge GenomeTM

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


See full index

Chemisty > Chemical changes > Flashcards

Chemical changes Flashcards

1
Q

what is the reactivity series of metals?

A

a list of metals which show how reactive they are compared to each other

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

What happens when metals react with other substances?

A

They loose electrons to form positive ions

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

true or false
Reactive metals loose there electrons difficulty?

A

False
Reactive metals loose there electrons easily

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

What happens when a metals react with water?

A

A metal hydroxide and hydrogen are formed eg. magnesium hydroxide

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

What happens when a metal reacts with a dilute acid?

A

It forms a salt and hydrogen gas. This don’t apply for less reactive metals eg. copper, silver, gold

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

What happens when a metal reacts with oxygen?

A

It creates a metal oxide eg. magnesium oxide

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

What happens when an acid reacts with a base?

A

It forms a salt and water

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

What happens when acid reacts with metal carbonates and hydrocarbonates?

A

It creates salt, water and carbon dioxide

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

What happens when acid reacts with ammonia?

A

It forms ammonia salt eg. ammonia sulphate

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

What are the 5 things that the beginning of a salts name could be?

A

Metal, metal oxide, metal carbonate, base or alkali

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

True or false
The second part of the salts name comes from the acid?

A

True
The second part of the names come from the acid

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

What is a redox reaction?

A

The transfer of electrons between two species eg.electron transfer system

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

What are the four reactions with bases?

A

acids react with bases to form a salt and water, reactions of base with metals, reaction of base with non-metal oxides, general properties of bases

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

What happens when there is a reaction with carbonates?

A

when acids react with carbonates salt, water and carbon dioxide are produced

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

what does the ph scale do?

A

it measures the acidity or basicity of a solution

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

What do the number of ph scale represent?

A

Acids-(0-6)
Neutral-(7)
Bases or alkali-(8-14)

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

what numbers of the ph scale represent a strong or weak acid

A

0- very strong
6-very weak

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

What numbers on the ph scale represent a strong or weak alkali?

A

14-very strong
8-very weak

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

What is electrolysis?

A

Is the splitting of compounds using electricity

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

What does electrolysis involve?

A

two electrodes, the anode(positively charged)
and the cathode(negatively charged

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

What else is present during electrolysis?

A

the electrode which has to be molten otherwise the ions wont be able to move

22
Q

What’s one difference between electrolysis and electrolysis of an aqueous solution

A

normal electrolysis needs the electrolyte to be in a molten salt or metal while aqueous uses an aqueous solution containing dissolved salts or acids

23
Q

What is electrolysis used to extract?

A

metals that are more reactive then carbon

24
Q

how do you use electrolysis to extract metals?

A

1.get the metal ions in a molten form
2.set up the electrolysis equipment
3.pass the electrical current through the metal ions
4.remove the pure metal deposits from the cathode

25
Q

which product is attracted to the cathode during electrolysis to extract metals?

A

the positive metal ions and are deposited as pure metal

26
Q

Which product is attracted to the anode during electrolysis to extract metals?

A

the negative metal ions

27
Q

What does electrolysis do to molten ionic compounds?

A

slipts them into its elements

28
Q

What is the equation at each electrode called?

A

half equations

29
Q

What is titration used to find out?

A

concentrations

30
Q

What neutralises an acid?

A

an alkali

31
Q

What is the equation for concentration?

A

conc=no. of moles/volume

32
Q

What equipment do you need for tirations?

A

pipette, burette(with a scale), acid, conical flask

33
Q

Why should you repeat tirtrations?

A

to increase the accuracy and spot any anomalous results

34
Q

What should you do after you’ve repeated the titration multiple times?

A

fine the mean volume

35
Q

When you stop the titration?

A

when the alkali and indicator turns clear

36
Q

When should you stop repeating the tirations?

A

when the answers are within 0.10cm**3

37
Q

What do acids produce in water?

A

protons

38
Q

What is the charge of a proton?

A

+1

39
Q

What is the charge of electrons?

A

-1

40
Q

what is the charge of a neutron?

A

0

41
Q

What is in a aqueous solution?

A

ions(from the ionic compound) and hydrogen ions and hydroxide ions from the water

42
Q

What charge is the cathode?

A

negative

43
Q

What charge is the anode?

A

positive

44
Q

What charge is attracted to the cathode?

A

positive

45
Q

What charge is adapted to the anode?

A

negative

46
Q

What happens if at the cathode H+ ions are present?

A

hydrogen gas will be produced if the the metals ions form ana element more reactive then hydrogen

47
Q

What happens if the metal is less reactive then hydrogen?

A

a solid layer of pure metal will form and coat the cathode

48
Q

What happens if OH- and halide ions are present at the anode?

A

molecules of chlorine, bromine or iodine will be formed

49
Q

What happens is no halide ions are present at the anode?

A

the OH- ions from the water will be discharged and oxygen and water will be formed

50
Q

What has to be balance in a half equation?

A

electrons

51
Q

What do half equations show?

A

the reactions at the electrodes( they show ions or atoms gaining or losing electrons)

52
Q

What does it show when you combine half equations?

A

ionic equation for the overall reaction

Chemisty (5 decks)

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