organic chemistry - carboxylic acids

Question 1

functional group of carboxylic acid?

Answer 1

-COOH

Question 2

methanoic acid?

Answer 2

HCOOH

Question 3

ethanoic acid?

Answer 3

CH3COOH

Question 4

propanoic acid?

Answer 4

CH3CH2COOH

Question 5

butanoic acid?

Answer 5

CH3CH2CH2COOH

Question 6

what are carboxylic acids in water?

Answer 6

weak acids. they only partially ionise

Question 7

what is happening in this equation?
ethanoic acid ->-< ethanoate ion + hydrogen

Answer 7

ethanoic acid is ionising to produce ethanoate ion and hydrogen + ion

Question 8

what does it mean that carboxylic acids only partially ionise in water?

Answer 8

they have a higher pH than a string acid such as hydrochloric acid

Question 9

what is produced when carboxylic acids react with metal carbonates?
propanoic acid + potassium carbonate->

Answer 9

salt + carbon dioxide + water
potassium propanoate + CO2 + H2O

Question 10

what is produced when alcohols react carboxylic acid reacts with an alcohol?

Answer 10

ester + water

Question 11

why are esters useful molecules?

Answer 11

they have a pleasant smell so are used a lot in foods

Question 12

ethanoic acid + ethanol ->

Answer 12

ethyl ethanoate

Question 13

what catalyst is required for reaction carboxylic acid with an alcohol? what type of reaction?

Answer 13

sulfuric acid catalyst
reversible reaction