11.7 Carboxylic Acids (Cambridge (CIE) O Level Chemistry): Flashcards
Exam code: 5070
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- FrontCarboxylic Acids
What is a carboxylic acid?
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Cards in this collection (14)
What is a carboxylic acid?
A carboxylic acid is an organic compound containing the carboxyl functional group (-COOH).
What is esterification?
Esterification is the reversible reaction between an alcohol and a carboxylic acid to form an ester and water, using concentrated sulfuric acid as catalyst.
Carboxylic acids react with metals to produce a salt and ______, and with carbonates to produce a salt, water and ______.
Carboxylic acids react with metals to produce a salt and hydrogen, and with carbonates to produce a salt, water and carbon dioxide.
In esterification, alcohol and carboxylic acid react to form an ______ and ______, using concentrated sulfuric acid as catalyst.
In esterification, alcohol and carboxylic acid react to form an ester and water, using concentrated sulfuric acid as catalyst.
What type of salt is formed when ethanoic acid reacts with sodium hydroxide?
Sodium ethanoate is formed. Salts of carboxylic acids end in the suffix -anoate.
Describe the visual change when ethanol is oxidised to ethanoic acid using acidified potassium manganate(VII).
The purple colour of potassium manganate(VII) changes to colourless as it is reduced while ethanol is oxidised to ethanoic acid.
Ethanoic acid is also known as ______ acid and is the acid found in ______.
Ethanoic acid is also known as acetic acid and is the acid found in vinegar.
Esters are generally ______-smelling and are used as food flavourings and ______.
Esters are generally sweet-smelling and are used as food flavourings and perfumes.
True or False?
Carboxylic acids react with metals to produce carbon dioxide gas.
False.
Carboxylic acids react with metals to produce hydrogen gas. Carbon dioxide is produced only when they react with carbonates.
True or False?
Esterification is an irreversible reaction that goes to completion.
False.
Esterification is reversible, as the ester and water produced can react to reform the original alcohol and carboxylic acid.
Salts formed from carboxylic acids end in the suffix ______.
Salts formed from carboxylic acids end in the suffix -anoate.
Ethanoic acid can be produced by oxidising ethanol with acidified potassium manganate(VII), which changes colour from ______ to ______.
Ethanoic acid can be produced by oxidising ethanol with acidified potassium manganate(VII), which changes colour from purple to colourless.
What products are formed when ethanoic acid reacts with sodium carbonate?
Sodium ethanoate, water and carbon dioxide are formed when ethanoic acid reacts with sodium carbonate.
State two methods for producing ethanoic acid.
Ethanoic acid can be produced by the bacterial oxidation of ethanol in the presence of oxygen, or by oxidising ethanol with acidified potassium manganate(VII).
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