AQA Chemistry Unit 2 (C2) Mindmap
Just a mindmap to hep brainstorm and remind you of some key facts on AQA unit 2's chemistry
- Created by: Triciaaa
- Created on: 03-01-13 23:13
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- Unit 2 Chemistry
- Structure and bonding
- Metallic structures: strong electrostatic forces of attraction.
- Structure and Properties
- Giant covalent
- Giant ionic
- Simple covalent
- Metallic
- Quantitative Chemistry
- Ar - how heavy
- paper chromatography
- GC graphs: retention time, how long it takes to be detected
- empirical: list all elements, experimental masses, divide by ar, nice ratio
- Rates of reaction
- Temperature
- Catalyst
- Surface area
- Concentration
- Catalysts reduce costs: never used up, low temperature, low fuel costs
- Poisoned by impurities, only use for one reaction
- Activation energy - lowest amount of energy required
- Exo/Endothermic reactions
- exo e.g. neutralisation and oxidation reactions
- Endo e.g. thermal decomposition
- Exo = hand warmers Endo = sport injury packs
- Acids, bases & salts
- alkali - base that dissolved in water
- precipitation - remove poisonous ions or treats effluent (sewage)
- OH- = alkaline H+ = acid
- soluble salt- alkali, metal, insoluble base
- insoluble precipitation, 2 solutions with 2 ions wanted
- Electrolysis
- process, electric current, electrolyte, decomposes
- electrolyte: ionic substance, molten , solution, electric current, decompose
- brine = sodium hydroxide, chlorine, hydrogen
- Cryolite, 200 to 90, low fuel costs
- Structure and bonding
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