What's in a Medicine 13.2 Alcohols and Ethers 3.0 / 5 based on 1 rating ? ChemistryAcids, bases and saltsFunctional GroupsA2/A-levelOCR Created by: EmilyCreated on: 15-01-13 10:13 What are the functional groups of alcohols and ethers? A have OH (hydroxyl), E have OR (alkoxy) 1 of 11 What does polyhydric mean? Substance contains more than one OH group 2 of 11 When are isomeric alcohols possible? With alcohols containing more than 2 C atoms 3 of 11 Why can alcohol molecules form hydrogen bonds? The molecules are polar due to the O—H 4 of 11 Under what conditions do you oxidise alcohols? Primary and secondary alcohols oxidise with acidified potassium dichromate (VI) where orange Chromate ions reduced to green Chromium ions. 5 of 11 What products are formed when alcohols are oxidised? Primary – carboxylic acid 6 of 11 When will oxidation of an alcohol not take place? When an H atom is not attached to a C to which the OH is attached 7 of 11 What is formed when alcohols undergo dehydration? What type of reaction is this? Corresponding alkene and water formed. Elimination (molecule of water removed) 8 of 11 What conditions are needed? Alcohol in vaporous state, aluminium oxide catalyst at 300oC or hear with conc. H2SO4 9 of 11 Are ethers polar? Why are ether molecules unable to form hydrogen bonds? Only slightly so they are only slightly soluble in water. There are no H atoms attached to the O 10 of 11 Which ethers are very volatile and flammable? The ‘lower’ ethers, i.e. less carbon atoms 11 of 11
COMPLETE - A2 - Chemistry - Unit 4 - Edexcel - New Spec 2008 5.0 / 5 based on 1 rating Teacher recommended
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