26.3 Carboxylic acids

Question 1

what is a carboxyl group?

Answer 1

contains a carboxyl and hydroxyl group
COOH

Question 2

why are carboxylic acids soluble in water?

Answer 2

hydroxyl group contains a hydrogen which can form hydrogen bonds with the lone pairs of oxygen in water molecules

Question 3

what happens to the solubility of carboxylic acids when you increase the chain length?

Answer 3

it decreases as there is a reduced effect of the OH group

Question 4

what type of acid are carboxylic acids?

Answer 4

weak acids

Question 5

what are the two reactions carboxylic acids can undertake?

Answer 5

redox
neutralisation

Question 6

carboxylic acid + metal

Answer 6

carboxylate salt + hydrogen

redox reaction

Question 7

what would you observe when a metal reacts with a carboxylic acid?

Answer 7

effervescence
metal dissolves

Question 8

carboxylic acid + metal oxides

Answer 8

carboxylate salt + water

Question 9

carboxylic acid + alkalis

Answer 9

carboxylate salt + water

Question 10

carboxylic acid + carbonate

Answer 10

carboxylate salt + water + carbon dioxide

Question 11

what is the test for a carboxylic acid group?

Answer 11

react with a Na2CO3

CO2 is produced (effervescence)