U2-2-1 - Esters

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Total cards: 21•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (21)

Front (Question)

Name this functional group

Back (Answer)

Ester link

Front (Question)

This group of compounds are isomers of esters.

Back (Answer)

Carboxylic acids

Front (Question)

Which two types of compounds react to form esters?

Back (Answer)

Alcohols and carboxylic acids

Front (Question)

Name this type of reaction

Back (Answer)

Condensation or esterification

Front (Question)

In a ………. reaction, two molecules are joined together with the elimination of a small molecule.

Back (Answer)

Condensation

Front (Question)

What catalyst is used in this reaction?

Back (Answer)

Concentrated sulfuric acid

Front (Question)

Which part of this ester came from the carboxylic acid?

Back (Answer)

The part attached to ‘C=O’

Front (Question)

Which part of this ester came from the alcohol?

Back (Answer)

The part attached to ‘C−O’

Front (Question)

Condensation reaction

Back (Answer)

In a condensation reaction, two molecules are joined together with the elimination of a small molecule.

#10

Front (Question)

In a ………… reaction, a molecule reacts with water to break down into smaller molecules.

Back (Answer)

hydrolysis opposite of condensation

#11

Front (Question)

During ester synthesis, it’s important to use a condenser (or a wet paper towel). Why?

Back (Answer)

To prevent volatile products/reactants from evaporating Esters are volatile

#12

Front (Question)

State two observations which would indicate you have made an ester

Back (Answer)

• Oily layer on the surface • Fruity fragrance

#13

Front (Question)

What two products are formed during ester hydrolysis?

Back (Answer)

Alcohol + Carboxylic acid

#14

Front (Question)

Hydrolysis

Back (Answer)

In a hydrolysis reaction, a molecule reacts with water to break down into smaller molecules. opposite of condensation

#15

Front (Question)

What does an ester link look like?

Back (Answer)

#16

Front (Question)

What type of solvents are esters? Polar or non-polar?

Back (Answer)

Non-polar

#17

Front (Question)

Complete the name of this ester: prop…. ethan…..

Back (Answer)

Propyl ethanoate Alcohol part ends in -yl, carboxylic acid part ends in -oate

#18

Front (Question)

Complete the name of this ester: …..yl …..oate

Back (Answer)

Ethyl methanoate Alcohol part ends in -yl, carboxylic acid part ends in -oate

#19

Front (Question)

Identify two functional groups in aspirin

Back (Answer)

Ester link (-COO-), carboxyl (COOH)

#20

Front (Question)

Identify two functional groups in erythrose

Back (Answer)

Hydroxyl (OH), carbonyl (C=O)

#21

Front (Question)

The reaction mixture needs to be heated during ester synthesis. Why is a Bunsen burner unsuitable for this?

Back (Answer)

Reactants/products are flammable Use e.g. water bath instead