Brainscape's Knowledge GenomeTM

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


See full index

Edexcel Chemistry GCSE > Y10 MOCKS > Flashcards

Y10 MOCKS Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards AP® Chemistry flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

what is the change of state from solid -> liquid?heat

A

melting

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

what is the change of state from liquid -> gas?

A

boiling/evaporation

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

what is the change of state from gas -> liquid?

A

condensation

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

what is the change of state from liquid -> solid?

A

freezing

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

what is the change of state between solid and gas?

A

sublimation

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

what is the energy change when melting?

A

heat taken in
energy is needed to break bonds between the particles in the solid

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

what is the energy change when boiling?

A

heat taken in
energy is needed to break the bonds between the particles in the liquid

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

what is the energy change when freezing?

A

heat given out
energy given out as particles bond together in the solid

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

what is the energy change when condensing?

A

heat given out
energy given out as particles bond together in the liquid

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

what are the main points of kinetic theory?

A

all matter is made of tiny, invisible, moving particles

the particles are constantly moving- the higher the temperature, the faster they move

heavier particles move more slowly than light ones at a given temperature

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

what is diffusion in chemistry?

A

the mixing of atoms or molecules due to their continuous and random motion

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

what is brownian motion?

A

the constant random movement of particles is caused by collision with air or water molecules which are themselves in continuous and random motion

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

what experiments are used to examine the motion of particles?

A

experiments using gases diffusing

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

what happens when ammonia and hydrochloric acid are put in a tube to investigate brownian motion?

A

ammonia moves further along the tube as the particles are lighter, so they move faster

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

what is an atom?

A

the smallest part of an element that can exist or take part in a chemical change

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

why do some elements form molecules?

A

in some gases, single atoms cannot exist on teir own at ordinary temperatures

17
Q

what is an element?

A

a pure substance made up of only one type of atom

18
Q

what is a compound?

A

a pure substance which contains 2+ elements that are chemically bonded together in a fixed proportion

19
Q

what is a mixture?

A

a group of substances that aren’t chemically bonded together

20
Q

what are the properties of a compound?

A

fixed properties

properties differ from those of the elements

cannot be separated into elements without a chemical reaction

there is usually an energy change when a compound is made from its elements

21
Q

what are the properties of a mixture?

A

proportions may vary

properties are simply those of the separate elements

can be separated by a physical change (e.g. melting)

no energy change when the elements are mixed

22
Q

what is a pure substance?

A

a substance that contains no other substances

23
Q

how does the melting point change in an impure substance?

A

they will then melt at a lower range of temperatures rather than a higher fixed one

24
Q

what separation technique is used for a solid and a liquid when the solid hasn’t been dissolved?

A

filtration

the liquid filtrate passes through and the undissolved solid residue stays on the paper

25
Q

what separation technique is used to get a solid out of a dissolved liquid and solid mixture?

A

evaporation

place the solution in an evaporation basin and heat to evaporate away the solvent

25
Q

what separation technique is used to get a solid out of a dissolved liquid and solid mixture?

A

evaporation

place the solution in an evaporation basin and heat to evaporate away the solvent

26
Q

what is the method for crystallisation?

A

the solution is heated until 2/3 of the water is evaporated away

a hot saturated solution is formed, which is cooled and crystals are formed

27
Q

what separation technique is used to get a liquid in a dissolved solid and liquid solution?

A

distillation

the solution is heated. the liquid evaporates and the vapour passes into a condenser where it cools and turns back into a liquid

the solid remains in the flask as a residue

28
Q

what separation technique is used to separate 2 immiscible liquids

A

separating funnel

when two liquids don’t mix, they can be separated by running off the denser liquid by opening the tap of a separating funnel
(denser solvent at the bottom)

29
Q

what separating technique is used for 2 miscible liquids?

A

fractional distillation

both liquids evaporate and the gases pass into a fractionating column. they are condensed and boiled many times. the vapour of the gas with the lower boiling point leaves the column first and passes into the condenser

30
Q

what separating techniques can be used for 2 solids?

A

dissolving and chromatography

31
Q

explain dissolving:

A

find a solvent that will dissolve one solid but not the other

heating is often necessary

filter, washing the residue on the filter paper with some of the solvent and dry it

to obtain the second solid (currently a solution), evaporate the filtrate

32
Q

what is chromatography?

A

separating 2 solids when both dissolve in the same solvent

find a solvent that will dissolve both solids and place 2 drops of it on the filter paper

the more soluble liquid will move further

the dissolved solids are now separated on the paper

33
Q

how can you calculate the Rf value?

A

distance travelled by the component
—————————————————
distance travelled by the solvent

34
Q

what is a halogen displacement reaction?

A

W2 + 2X —> 2W + X2

35
Q

acid + metal hydroxide —>

A

salt + water

H+ + OH- -> H2O

36
Q

acid + metal oxide —>

A

salt + water

2H+ + O2- -> H2O

37
Q

acid + carbonate —>

A

salt + water + carbon dioxide

H+ + HCO3- —> H2O + CO2

38
Q

what is a precipitation reaction?

A

cation + anion —> precipitate
+. -

Edexcel Chemistry GCSE (3 decks)

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