OCR A2 Chemistry: Phenols 0.0 / 5 ? ChemistryAcids, bases and saltsA2/A-levelOCR Created by: LucySPGCreated on: 15-09-13 14:00 What is the formula for a phenol? C6 H5 OH 1 of 14 What are phenols? Compounds that have one or more -OH groups attached directly to a benzene ring 2 of 14 What is the test for phenols? Iron III chloride - turns purple 3 of 14 Is a phenol a strong or weak acid? Weak acid 4 of 14 Why is the the O- ion on the phenol so stable? The electric charge gets spread out by delocalisation onto the benzene ring 5 of 14 What happens to the phenol when added to an aqueous solution? Dissociates in water to form a phenoxide ion and a H+ ion 6 of 14 Why do phenols dissolve a little bit in water? The hydroxyl group is able to form hydrogen bonds with the water molecules 7 of 14 What is formed when a phenol reacts with a base? A salt and water 8 of 14 What happens to the hydrogen ion on the phenol when it reacts with a base? It is removed by the -OH ion 9 of 14 Why don't phenols react with carbonates? Because they are not strong enough bases to remove the hydrogen ion from the phenol 10 of 14 What do the names of acyl chlorides end in? -oyl chloride 11 of 14 How do you form an ester using phenols? React with an acyl chloride 12 of 14 Why are penols reacted with acyl chlorides instead of carboxylic acids to make esters? Phenols react very slowly with carboxylic acids 13 of 14 What is formed when you react a phenol with an acyl chloride? An ester and hydrogen chloride gas 14 of 14
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