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Chemistry GCSE > Last minutes pls save me lord and Jesus Christ our saviour amen > Flashcards

Last minutes pls save me lord and Jesus Christ our saviour amen Flashcards

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1
Q

Acid+ metal oxide goes to…

A

Salt+ water

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2
Q

Acid+ metal hydroxide goes to …

A

Salt + water

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3
Q

Acid + ammonia goes to…

A

Ammonium salt

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4
Q

Acid + metal carbonate goes to…

A

Salt+ water+ carbon dioxide

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5
Q

Acid is a proton…

A

Donor

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6
Q

Bases are a proton…

A

Acceptor

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7
Q

Alkalis are …… That are (soluble/ insoluble) in water

A

Bases that are soluble

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8
Q

Examples of bases

A

Ammonia, metal oxides, metal hydroxides

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9
Q

Experiment- making a soluble salt

A

Heat the acid in a water bath (in fume cupboard)

Add base to acid

Filter excess solid

Heat gently to evaporate water

Crystals become Insoluble in cold, concentrated solution

Eg make hydrated copper (II) using copper (II) oxide

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10
Q

Covalent compounds as conductors

A

Don’t usually conduct

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11
Q

Ionic compounds as conductors

A

Don’t as solid

So as molten in aqueous solution

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12
Q

Rf value

A

Solute/ solvent

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13
Q

Group one is

A

Alkali

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14
Q

Chlorine is

A

A green gas

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15
Q

Bromine is a

A

Red-brown liquid

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16
Q

Iodine is a

A

Dark grey solid

17
Q

Sulphur combusts

A

With a pale blue flame
Produces sulphur dioxide
Acidic when dissolved in water

18
Q

Acids are a source

A

Of hydrogen ions

19
Q

Alkalis are a source of

A

Hydroxide ions

20
Q

Simple distillation

A

Liquid from a solution

Condenser

21
Q

Fractional

A 
Mixture of liquids 
Diff boiling points 
Condenser 
Fractionating column, glass rods,
Collect in diff tubes
22
Q

Crystallisation

A

Dissolve salt
Filter
Evaporate water

23
Q

Define isotope

A

Same number of protons, different number of neutrons

24
Q

Obtain formula experimentally

A

Use mass loss in reduction or oxidation

Empirical formula

25
Q

Acid is a proton

A

donor

26
Q

Bases are a proton

A

Accepter

27
Q

Equation for heat energy transferred

A

Mass x specific heat capacity x change in temp

28
Q

Calorimetry experiment combustion

A 
Draught excluders 
50g of water in copper cup, rec temp
Weigh spirit burner and lid
Heat, Stir constantly until reaches 50c
Out out flame, Measure final temp
Weigh spirit burner again
Calc enthalpy change
29
Q

Calorimetry dissolving displacement and neutralisation

A

Polystyrene cup
Cotton wool, lid, prevent heat loss
HCl and NaOH, to 25c in water bath, SEPARATELY
add
Take temperature every 30s till highest temp

30
Q

Molar enthalpy change

A

Heat energy change, Q (use equation)
Find number of moles in fuel
Heat energy transferred by 1 mole of fuel
Could be negative ???? Pg 57

31
Q

Reversible reactions,

A

Heat and cool down

32
Q

Homologous

A

Same general formula

33
Q

Isomers

A

Same molecular formula, different structural formula

34
Q

Formation of an addition polymer

A

Joining up many small monomers

35
Q

Test for alkene

A

Orange bromine water goes colourless

Forms dibromoalkane

36
Q

Halogens react with alkanes

A

Haloalkanes
In the present of UV light
Eg bromomethane

37
Q

Fractions in order

A 
Refinery gas- domestic heating
Gasoline- car fuel
Kerosine- aircraft fuel 
Diesel - large vehicles 
fuel oil-large ships, power stations 
Bitumen - road surfacing

Chemistry GCSE (8 decks)

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