Unit 2 - Carboxylic acids

Question 1

What is the fonctional group of carboxylic acid?

Answer 1

Carboxyl group (COOH)

Question 2

WHat is the general formula for carboxylic acid?

Answer 2

C_nH_2n+1COOH

Question 3

Draw pentanoic acid

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Name: Hexanoic acid

Chemical formula: C₅H₁₁COOH

Question 6

Answer 6

Butanoic acid

Question 7

Which carboxylic acid between ethanoic acid and methanoic acid will have the higher boiling point? why?

Answer 7

Ethanoic acid will have a higher boiling point because it is a bigger molecule than methanoic acid, so there will be more intermolecular forces between the molecules.

Question 8

Answer 8

Name: hexanoic acid

Shortened structural formula: CH₃CH₂CH₂CH₂CH₂COOH

Question 9

Write the molecular formula for a carboxylic acid with 41 carbons

Answer 9

C₄₀H₈₁COOH

Question 10

Write the molecular formula for a carboxylic acid with 17 carbons

Answer 10

C₁₆H₃₃COOH

Question 11

What is the “common” name for ethanoic acid?

Answer 11

Vinegar

Question 12

What is the pH range of carboxylic acid?

Answer 12

Acidic / pH under 7

Question 13

Give one use for carboxylic acid

Answer 13

• cleaning product
• preservative for food

Question 14

What is the name of the carboxylic acid C₆H₁₃COOH

Answer 14

Heptanoic acid