Chem Unit 2 Revision
- Created by: BaljinderM
- Created on: 08-04-15 12:45
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- Chemistry Unit 2
- Shapes of Molecules
- 3 Electron Pairs
- No Lone Pairs= Trigonal Planar (120o)
- 1 Lone Pair= V Shaped (120o)
- 4 Electron Pairs
- 0 Lone Pairs= Tetrahedral (109.5o)
- 1 Lone Pair= Pyramidal (107o)
- 2 Lone Pairs= V Shaped (104.5o)
- 5 Electron Pairs
- 0 Lone Pairs= Trigonal Bipyramidal (120o and 90o)
- 3 Electron Pairs
- Group 2 Metal
- Solubility of hydroxides increases down the group
- Solubility of sulphates increase up the group
- Thermal Stability increases down a group
- Silver Nitrate Test for halide ions
- Chloride= White Precipitate
- Bromide= Cream Precipitate
- Iodide=Yellow Precipitate
- Alcohols
- Haloalkanes can be made using Phosphorus (III) Halides
- Primary Alcohols oxidised to aldehydes and then carboxylic acids
- Secondary Alcohols oxidised to ketones
- Elimination
- addition of KOH forms alkenes
- Haloalkanes react with ammonia to form amines
- Types of reagents (Alcohols)
- Nucleophile
- electron pair donors- breaks C-H bond as highly negative (heterolytic fission)
- Electrophile
- electron pair acceptors- breaks C=C bond as highly positive (heterolytic fission)
- Free Radicals
- have unpaired electron- formed by homolytic fission
- Nucleophile
- Shapes of Molecules
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