click below
click below
Normal Size Small Size show me how
Alcohols
Unit 2
Question | Answer |
---|---|
What is the colour change that occurs when alcohols are oxidised? | orange to green |
What are the products when a primary alcohol is oxidised? | aldehyde (distillation) carboxylic acid (reflux) |
What are the products when a secondary alcohol is oxidised? | ketone |
What are the products when a tertiary alcohol is oxidised? | none, resistant to oxidation |
Properties of alcohols | low volatility and high boiling points-compared to alkanes |
Why? | hydrogen bonds |
Solubility | first 3 dissolve in water, form hydrogen bonds between OH- and H20. Large alcohols the carbon chain is too long, non polar. |
How is ethanol manufactured? | steam hydration (of ethene) with an acid catalyst. 300C and 6atm |
How else is ethanol manufactured? | fermentation of glucose 37C and yeast produces CO2 |
Ethanol is used for... | alcoholic drinks biofuel |
methylated sprits | industrial solvent |
methanol | chemical feedstock unleaded petrol |