Final notes Flashcards
How to find charge?
Charge (coloumbs)= current x time
What does one faraday equal?
96,000 coloumbs or 1 mole of electrons
Burning in oxygen?
Magnesium- bright white flame, white powder
Carbon- orange/yellow flame, acidic
Sulfur- pale blue flame, acidic
Cation flame test?
Lithium- red
Sodium- yellow/orange
Pottassium- lilac
Calcium- brick red
Coloured precipitate when sodium hydroxide added?
Copper (II)- blue
Iron (II)- sludge green
Iron (III)- brown
What happens when an ammonium compound is added to sodium Hydroxide?
Ammonia produced, Turns red litmus paper blue
What do carbonates give off with hcl?
Carbon Dioxide
What happens when sulphates are added to barium chloride?
White precipitate
What colour precipitates are there when halides are added to silver Nitrate?
Chlorine- white
Bromine- cream
Iodide- yellow
How to do electrolysis half equation at cathode?
Positive ion + electron = neutral atom
How to do electrolysis half equation at anode?
Negative ion = neutral atom + electron
Conditions for Ethene + steam = Ethanol?
300 degrees
60-70 amps
Phosphoric acid catalyst
Conditions for fermentation reaction ( glucose= ethanol)
30 degrees
Yeast containing zymase as catalyst
Conditions for dehydration reaction, Ethanol= ethene + water?
Aluminium oxide catalyst
Extracting Aluminium equation at cathode?
AL3+ + 3E- = AL
Extracting Aluminium equation at anode?
202- = O2 + 4E-
Expensive due to heating, and replacing anode, as it reacts with oxygen
Main products in extracting iron?
Iron ore (oxide)- contains iron
Coke- contains carbon
Limestone- takes away impurities
What’s cracking hydrocarbons?
Done as smaller hydrocarbons required, vapourised hydrocarbons passed over alumina or silica catalyst at 600-700 degrees
What’s an addition polymer?
Alkenes, put under high pressure, turning them into a polymer
What’s a condensastion polymer?
Monomer + monomer = Condensastion monomer + water
Uses of polymers?
Poly ethene- plastic bags
Poly propene- kettles
Poly chloroehtene - insulation for electric pipes
Haber process?
N2 + 3H2 (reversible) 3NH3
Nitrogen from air
Hydrogen from natural gas
450 degrees
200 amp
iron catalyst
Contact process conditions?
450 degrees
2 amps
vanadium oxide catalyst
Uses of products from electrolysis of Brine (NACL)?
Chlorine- bleach
Hydrogen- Haber process
Sodium Hydroxide- Soap
Colours when haldies displaced?
Bromide= orange iodide= brown
Making soluble salts with acid and insoluble base?
Grind up insolouble base
Add insoluble base to acid, stir, base dissolves, know when it’s done because excess dolid sinks to bottom
Filter soloution
Wash soloution with distilled water
Evaporate
Leave to dry
Put in drying oven
