Carboxylic acids and esters | Chemistry | Quizalize & Oak National Academy

Starter quiz

Match the homologous series of compounds with the correct functional group.

alkene

⇔

C=C ✓

alcohol

⇔

OH ✓

carboxylic acid

⇔

COOH ✓
What is the name of the carboxylic acid in the image?

butanoic acid

ethanoic acid ✓

propanoic acid

methanoic acid
Order the carboxylic acids by increasing chain length starting with the shortest carboxylic acid.

1

⇔

methanoic acid

2

⇔

ethanoic acid

3

⇔

propanoic acid

4

⇔

butanoic acid

5

⇔

pentanoic acid
What is produced when an alcohol is oxidised using an oxidising agent?

alkane

alkene

alcohol

carboxylic acid ✓

ester
What are the products from reactions between acids and metal carbonates?

salt + carbon dioxide

salt + water

salt + hydrogen

salt + hydrogen + water

salt + carbon dioxide + water ✓
Which of the following statements about weak acids are true?

partially dissociate to produce H⁺ ions in solution ✓

fully dissociate to produce H⁺ ions in solution

have a pH of 1

form a blue or purple colour with universal indicator solution

form an orange, yellow or pale green colour with universal indicator solution ✓

Name the molecule shown in the image.

'ethanoic acid' ✓
Which functional group do esters contain?

C=C

-OH

COOH

-COO- ✓
Where are esters used?

in perfumes ✓

as fuels

as flavourings ✓

in alcoholic drinks
Match the key term with the correct definition

carboxylic acids

⇔

A homologous series of compounds containing the -COOH functional group ✓

weak acids

⇔

Partially dissociate to form Hᐩ ions in solution ✓

carbonate

⇔

A compound containing the CO₃²ᐨ ion. ✓

esters

⇔

A homologous series of compounds containing the -COO- functional group ✓
What are the products when a metal carbonate reacts with a carboxylic acid?

metal salt ✓

hydrogen

water ✓

carbon dioxide ✓

oxygen
Which two reactants can react together to form the ester ethyl ethanoate?

methanol

ethanol ✓

methanoic acid

ethanoic acid ✓

ethane

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Carboxylic acids have a -COOH functional group.
Carboxylic acids are weak acids.
When ethanol is oxidised, ethanoic acid is formed.
Carboxylic acids react with carbonates to produce a metal salt, carbon dioxide and water.
Carboxylic acid can react with alcohol to produce esters (such as ethyl ethanoate).

Confusing the concentration and strength of acids.

Clearly define a strong and weak acid.

Carboxylic acids - Carboxylic acids are a homologous series of compounds that contain the -COOH functional group.
Weak acids - Weak acids partially dissociate to form Hᐩ ions in solution.
Carbonate - A carbonate is a compound containing the CO₃²ᐨ ion. An example is calcium carbonate CaCO₃.
Esters - Esters are a homologous series of compounds that contain the -COO- functional group.
Ethyl ethanoate - Ethyl ethanoate is an ester produced from the alcohol ethanol and the carboxylic acid ethanoic acid.