Carboxylic Acids

Question 1

What is a carboxylic acid

Answer 1

A weak organic acid that has at least one carboxyl group in it

Question 2

What is a carboxyl group

Answer 2

A Carbon atom that is double bonded to oxygen and single bonded to a hydroxyl group.
OH-C=O (COOH)

Question 3

I’m what is the simplest aromatic carboxylic acid called?

Answer 3

Benzoic acid

Question 4

What happens when a compound has more than one carboxyl group?

Answer 4

The number of the carbons that have the carboxyl group then a prefix such as di ,tri, tetra, penta, hexa, etc is added before -carboxylic acid.

Question 5

What are the properties of a carboxylic acid

Answer 5

They have two polar groups (carbonyl & hydroxyl) which makes a carboxylic acid VERY POLAR.

Very soluble due to their hydrogen bonds, however, the more carbons the are the less soluble it becomes.

A very high melting point compared to their hydrocarbon counter part due to their dipole interactions of the polar carboxyl group.

They affect acid-base reaction and can be indicated using LITMUS PAPER.

Can react with bases and form a neutralization reaction

Question 6

Reactions of carboxylic acids

Answer 6

Oxidation reaction:
Primary alcohol + (O) = aldehyde
Aldehyde + (O) +dichromate (Cr2O7) as a catalyst = carboxylic acid

NOTE THAT THE DICHROMATE GOES FROM ORANGE TO GREEN DURING THE REACTION

Question 7

How to name a carboxylic acid

Answer 7

1- longest carbon chain including carbon from carboxyl group.
2- drop the “-e” add “-oic”