Organic Chemistry
- Created by: Lizzi
- Created on: 17-05-13 16:49
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- Organic Chemistry
- Structures
- Series of molecules have a general formula (homologous series)
- Alcohols have the functional group -O-H
- Carboxylic acids have the functional group -COOH
- Esters have have the functional group -COO-
- Properties/ uses of Alcohols
- Used for solvents, fuels, and (mainly ethanol) in alcoholic drinks
- Burnt in air to form CO2 and water
- C2H5OH + 3O2 --> 2CO2 + 3H2O
- React with sodium to form a solution and give off hydrogen
- Ethanol can be oxidised to ethanoic acid (either by oxidising agents or by microbes). Main acid in vinegar
- Carboxylic acids and Esters
- Carboxylic acids have a pH below 7
- Carboxylic acid and carbonate: fizzes, releasing CO2
- Aqueous solutions of weak acids have higher pH than solutions of strong acids with the same conc.
- Carbozylic acid + alcohol --> (with help of acidic catalyst) ester
- Esters are volatile compounds used in flavourings and perfumes
- Organic Issues
- Used in foods/ drinks/ solvents/ fuels- can benefit society
- Alcohol and solvents abused
- Biofuels (like ethanol and esters) could be used as a crude oil alternative
- Biofuels may conflict with need to feed the world
- Structures
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