Esters

Question 1

What is the word equation to make an ester?

Answer 1

Carboxylic acid + alcohol -> ester + water

(REVERSIBLE REACTION)

Question 2

What is the functional group of esters?

Answer 2

-COO

Question 3

What is the reaction called between carboxylic acids and alcohols to form esters?

Answer 3

Esterification reactions.

Question 4

What is another name for esterification reactions and why can it be called this?

Answer 4

Condensation reactions because they produce water.

Question 5

What substances do you need to perform an esterification practical?

Answer 5

Ethanoic acid, ethanol or pentan-1-ol, concentrated sulphuric acid and sodium carbonate solution.

Question 6

Why do you need strong sulphuric acid in an esterification reaction?

Answer 6

To act as a catalyst.

Question 7

Why do you need sodium carbonate in an esterification reaction?

Answer 7

To neutralise the reaction.

Question 8

Ethyl and pentyl ethanoates are volatile, what does this mean?

Answer 8

They are smelly compounds with a low boiling point.

Question 9

Give 3 uses of ethyl ethanoate:

Answer 9

-In food, for example flavouring in confectionary

-Solvents, for example glue/nail polish remover

-In paints, as an activator/hardener.

Question 10

Give 3 uses of pentyl ethanoate:

Answer 10

-Banana/apple scents

-Liquid bandages

-used to make penicillin.

Question 11

What is the displayed formula for ethyl ethanoate?