c3.5 Organic Chemistry

Question 1

What type of organic compound is ethyl propanoate

Answer 1

Ester

Question 2

Organic compounds such as ethyl propanoate are used in perfumes.
Give two properties of these compounds that make them suitable for use in perfumes. [2]

Answer 2

Pleasant smell [1]

Volatile (evaporate easily) [1]

Question 3

Ethanol is an alcohol.
One use of ethanol is in alcoholic drinks.
Give two other uses of ethanol. [2]

Answer 3

Fuel
Solvent
Antiseptic

Question 4

What type of reaction produces ethanoic acid from ethanol?

Answer 4

oxidation

Question 5

Solutions of ethanoic acid and hydrochloric acid with the same concentration have different pH values.
Explain why the solution of ethanoic acid has a higher pH than the solution of hydrochloric acid. [2]

Answer 5

ethanoic acid is a weak acid

because it partially ionises

Question 6

Name the ester made from ethanol and ethanoic acid. [1]

Answer 6

ethyl ethanoate

Question 7

What type of chemical is used as a catalyst in this reaction? [1]

Answer 7

acid

Question 8

Esters are used in perfumes because they smell pleasant and are volatile.
What does volatile mean? [1]

Answer 8

evaporates easily / quickly

Question 9

When acids react with scale a gas is produced.

What is the name of the gas? [1]

Answer 9

Carbon dioxide

Question 10

The student found that hydrochloric acid reacts faster than ethanoic acid with scale.
Explain why hydrochloric acid reacts faster than ethanoic acid. [2]

Answer 10

hydrochloric acid is a strong acid

which fully ionises