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Chemistry > MUST KNOW > Flashcards

MUST KNOW Flashcards

1
Q

colour of Fe2+ compounds/solutions

A

pale green

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2
Q

colour of Fe3+ compounds/solutions

A

brown

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3
Q

colour of Cu2+ compounds / solutions

A

blue

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4
Q

colour of precipitate reacting Cu2+ with 2OH-

A

blue

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5
Q

colour of precipitate reacting Fe2+ with 2OH-

A

green

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6
Q

colour of precipitate reacting Fe3+ with 2OH-

A

orange/brown

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7
Q

testing for carbonates or acids

A

react with an acid/carbonate, pass gas given off through limewater, will go cloudy if acid/carbonate as gas is CO2

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8
Q

testing for a sulfate

A

react a solution of the sulfate with barium chloride
white precipitate of barium sulfate is formed
this can be prepared from the solution by filtration

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9
Q

overall energy change =

A

energy in - energy out

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10
Q

burning hydrocarbons produces

A

carbon dioxide + water

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11
Q

what do acids react with to form ____

A

metals
bases
carbonates
to form salts

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12
Q

incomplete combustion - when
forms what

A

supply of oxygen is limited
carbon (soot)
carbon monoxide
as well as CO2 + H2O

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13
Q

poly(propene) uses (PP)

A

dishwasher safe food containers
car parts

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14
Q

polyvinylchloride (PVC) uses

A

pipes
raincoats
electrical insulation
door frames

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15
Q

polytetrafluoroethane (PTFE) uses

A

teflon- non stick coating

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16
Q

alcohols formula

A

CnH2n+1OH

17
Q

testing for alcohols

A

react with potassium dichromate solution
turns from orange to green

18
Q

testing for alkenes

A

add bromine water
turns from orange to colourless

19
Q

products reacting acid with metals

A

salt
hydrogen gas

20
Q

test for ammonia gas

A

ammonia gas will turn red litmus paper blue

21
Q

test for ammonia ions

A

add sodium hydroxide
ammonia gas will be given off and can be tested for - will turn red litmus paper blue

22
Q

products when reacting acid with a base or alkali (neutralisation)

A

Salt + water

23
Q

products when reacting acid with carbonates

A

salt
water
carbon dioxide

24
Q

test for chlorine ions

A

add to silver nitrate solution
give a white precipitate of silver chloride

25
Q

test for bromide ions

A

add to silver nitrate solution
give a cream precipitate of silver bromide

26
Q

test for iodide ions

A

add to silver nitrate solution
give a yellow precipitate of silver iodide

Chemistry (7 decks)

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