MUST KNOW Flashcards
colour of Fe2+ compounds/solutions
pale green
colour of Fe3+ compounds/solutions
brown
colour of Cu2+ compounds / solutions
blue
colour of precipitate reacting Cu2+ with 2OH-
blue
colour of precipitate reacting Fe2+ with 2OH-
green
colour of precipitate reacting Fe3+ with 2OH-
orange/brown
testing for carbonates or acids
react with an acid/carbonate, pass gas given off through limewater, will go cloudy if acid/carbonate as gas is CO2
testing for a sulfate
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
overall energy change =
energy in - energy out
burning hydrocarbons produces
carbon dioxide + water
what do acids react with to form ____
metals
bases
carbonates
to form salts
incomplete combustion - when
forms what
supply of oxygen is limited
carbon (soot)
carbon monoxide
as well as CO2 + H2O
poly(propene) uses (PP)
dishwasher safe food containers
car parts
polyvinylchloride (PVC) uses
pipes
raincoats
electrical insulation
door frames
polytetrafluoroethane (PTFE) uses
teflon- non stick coating
alcohols formula
CnH2n+1OH
testing for alcohols
react with potassium dichromate solution
turns from orange to green
testing for alkenes
add bromine water
turns from orange to colourless
products reacting acid with metals
salt
hydrogen gas
test for ammonia gas
ammonia gas will turn red litmus paper blue
test for ammonia ions
add sodium hydroxide
ammonia gas will be given off and can be tested for - will turn red litmus paper blue
products when reacting acid with a base or alkali (neutralisation)
Salt + water
products when reacting acid with carbonates
salt
water
carbon dioxide
test for chlorine ions
add to silver nitrate solution
give a white precipitate of silver chloride
