PAPER 2 - LAST MIN STUFF Flashcards
Describe how the student can make small and medium sized marble chips from large chips
Explain, in terms of particles, why the rate of reaction between the ribbon and dilute acid slows as the reaction takes place
Why the rate of reaction increased when the temperature was increased
Describe how monomers form a polymer
Bromine water test
Alkenes –> colourless
Alkanes –> REMAIN orange
Explain why ethene is an unsaturated hydrocarbon
Explain why the test for a given ion must be unique to that ion
What colour is the METAL ION Iron(II)?
Green
What colour is the METAL ION Iron(III)?
Brown
What colour is the METAL ION Copper?
Blue
What colour is the METAL ION Calcium?
White
What colour is the METAL ION Aluminium?
White
What colour is the HALIDE ION Chloride?
White
What colour is the HALIDE ION Bromide?
Cream
What colour is the HALIDE ION Iodine?
Yellow
Give a reason why instrumental analysis may be better than other methods of analysis
Improved accuracy
How to distinguish between aluminium ions and calcium ions?
Describe the test to show the gas is ammonia
Describe how to do a flame test
Give the name of the most common gas in the Earth’s early atmosphere
Co2
Clay ceramic properties
- DOES NOT REACT WITH WATER
*
Size of nanoparticle?
- Few hundred atoms
- 1 × 10–7 metres (100 nano)
Why are nanoparticles used in sunscreens
Risk of nanoparticles?
Nanoparticles radius?
50 nm
Polymer advantages
poly(ethene) uses:
- Plastic bags
poly(chloroethene) uses:
- Window frames
poly(tetraflouroethene) uses:
- Non stick coating on pans
Problems with manufacture of polymers
- Crude oil is finite & Raw material
- Greenhouse gases
Problems with disposal of polymers
- Non-biodegradable
- Global warming
- Some are recycled
Problems with recycling of polymers
Explain why chlorine is more reactive than iodine
Explain why graphene will be a good conductor of an electric current
