Unit 2 Esters

Question 1

An ester is made from which 2 compunds?

Answer 1

Alcohol
Carboxylic acid

Question 2

Name the reaction in which esters are formed?

Answer 2

Condensation

Question 3

What is the functional group in alcohol?

Answer 3

-OH
Hydoxly

Question 4

What is the functional group in carboclyic acids?

Answer 4

-COOH
Carboxly

Question 5

What is the functional group in esters?

Answer 5

-COO
Ester link

Question 6

What does the condensation of alcohol and carboxylic acid produce?

Answer 6

Ester and water

Question 7

What can esters be used in?

Answer 7

Perfumes
Deodrents
Food flavouring

Question 8

How do u name a ester?

Answer 8

Alchol
(Methanol) drop anol add yl (ethyl)
Carboxylic acid
(Methanoic) drop anoic add oate (methanoate)

Question 9

What is the definition of a condensation reaction?

Answer 9

Build up of small molecules to large by the elimination of water

Question 10

What are 2 observations showing an ester is produced?

Answer 10

Oily layer on surface
Sweet fragrance

Question 11

What is the catalyst used in formation of a ester?

Answer 11

Concentrated sulphuric acid

Question 12

Name the reaction in which esters are broken down?

Answer 12

Hydrolysis

Question 13

What is the definition of hydrolysis reaction?

Answer 13

Break down of large molecules to small by addition of water

Question 14

What is the purpose of a condenser when making esters?

Answer 14

To ensure no volatile reactants or ester evaporate