5.3.2 Carboxylic Acids

Question 1

What is a carboxylic acid?

Answer 1

An organic molecule containing a -COOH functional group

Question 2

What is the structure of the name of a carboxylic acid?

Answer 2

Start of the name shows how many carbon atoms there are, the end of the name is “oic acid” to show it is a carboxyclic acid.

Question 3

What is the molecular formula and the structural formula of methanoic acid?

Answer 3

CH2O2 and HCOOH

Question 4

What is the molecular formula and the structural formula of ethanoic acid?

Answer 4

C2H4O2 and CH3COOH

Question 5

What is the molecular formula and the structural formula of propanoic acid?

Answer 5

C3H6O2 and CH3CH2COOH

Question 6

What is the molecular formula and the structural formula of butanoic acid?

Answer 6

C4H8O2 and CH3CH2CH2COOH

Question 7

How does vinegar form?

Answer 7

Vinegar is an aqueous solution of ethanoic acid Forms when ethanol in wine undergoes microbial oxidation:
C2H5OH + 2[O] –> CH3COOH + H2O
Vinegar is very sour and acidic

Question 8

What happens when carboxylic acids form a salt?

Answer 8

Donates H+ and becomes negatively charged Changes from “oic” acid to “oate” salt

Question 9

True or False: carboxylic acids react with metals and metal carbonates like a normal acid?

Answer 9

True - they form a salt with the ending “oate”