26.3-Carboxylic acids

Question 1

What functional group does carboxylic acid have ?

Answer 1

carboxyl group

Question 2

Why is carboxylic acids able to dissolve in water ?

Answer 2

C=O and O=H bonds are polar so can form hydrogen bonds with water

Question 3

Up to what number of carbon atoms are carboxylic acids soluble in water ?

Answer 3

4

Question 4

What happens to solubility of carboxylic acids when number of carbon atoms increases ?

Answer 4

decreases

non-polar carbon chain has a greater effect on overall polarity

Question 5

Are carboxylic acids strong acids or weak acids ?

Answer 5

weak acids

Question 6

Why are carboxylic acids classified as weak acids ?

Answer 6

partially dissociate when dissolved in aqueous solution

Question 7

What type of reactions do carboxylic acids take part in ?

Answer 7

redox reactions with metals

neutralisation reactions

Question 8

What type of salts do carboxylic acids form ?

Answer 8

carboxylate salts

Question 9

What does aqueous solutions of carboxylic acids react with metals to form ?

Answer 9

carboxylate salt

hydrogen gas

Question 10

What would you observe when metal reacts with carboxylic acid ?

Answer 10

metal disappears

effervescence of hydrogen gas

Question 11

What is formed when carboxylic acids react with metal oxides ?

Answer 11

salt

water

Question 12

What is formed when carboxylic acids react with alkali ?

Answer 12

salt

water

Question 13

What is formed when carboxylic acid reacts with carbonates ?

Answer 13

salt
carbon dioxide
water

Question 14

What is the test for carboxylic acid ?

Answer 14

neutralisation reaction with carbonate as its acidic enough