IC Properties and uses of carboxylic acids © Oxford University Press 2011 Properties and uses of carboxylic acids

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Every carboxylic acid has the same functional group, so they all have similar chemical properties:

IC Properties and uses of carboxylic acids © Oxford University Press 2011 They dissolve in water to make acidic solutions, with pH less than 7.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 They react with carbonates to produce carbon dioxide gas. For example: Calcium ethanoate is a salt. ethanoic acid calcium carbonate calcium ethanoate water carbon dioxide +  ++

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Carboxylic acids have many uses.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Vinegar is a solution of ethanoic acid and other compounds in water.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Citric acid is added to many drinks to give them a sour taste.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Aspirin is an important carboxylic acid. It is used as a painkiller, and is also taken by people at risk of heart attack since it reduces blood clotting.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Many fruits and vegetables contain ascorbic acid, vitamin C. Vitamin C is vital for health.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 When an ant stings, it injects its victim with methanoic acid.

IC Properties and uses of carboxylic acids © Oxford University Press 2011 Butanoic acid gives rancid butter its foul smell, and vomit its sour taste. Anti-whaling protesters shot butanoic acid at a Japanese whaling ship in 2010.

IC Properties and uses of carboxylic acids © Oxford University Press Describe two properties of carboxylic acids that are typical of all acids.  They dissolve in water to make acidic solutions, with pH less than 7.  They react with carbonates to produce carbon dioxide gas.

IC Properties and uses of carboxylic acids © Oxford University Press In the reaction of propanoic acid with sodium carbonate, what are the three products?  sodium propanoate  carbon dioxide  water