Carboxylic Acids

Question 1

What is the functional group of carboxylic acids?

Answer 1

-COOH

Question 2

What letters in the name of an organic molecules show its a carboxylic acid?

Answer 2

‘-oic acid’

Question 3

What is the behaviour of carboxylic acids?

Answer 3

An acid is a H+ donor, so like all other acids carboxylic acids donate H+ ions to form salts.
The carboxylic acid functional group (COOH) loses its H+ and becomes negatively charged.
The name changes from ‘-oic acid’ in the carboxylic acid to ‘-oate’ in the salt.

Question 4

Carboxylic Acid + Metal -> ?

Answer 4

Carboxylic Acid + Metal -> Salt + Hydrogen

(like other acids)

Question 5

What are 2 observations in a carboxylic acid + metal reaction?

Answer 5

-Effervescence
-Solid disappears

Question 6

Carboxylic Acid + Metal Carbonate -> ?

Answer 6

Carboxylic Acid + Metal Carbonate -> Salt + Water + Carbon Dioxide

Question 7

Carboxylic Acid + Alcohol -> ?

Answer 7

Carboxylic Acid + Alcohol -> Ester + Water

Question 8

How are carboxylic acids made?

Answer 8

When alcohols are oxidised and gain another oxygen atom.