Ethanoic acid is a carboxylic acid. Its structural formula is CH3COOH\text{CH}_3\text{COOH}CH3COOH. Vinegar is a dilute solution of ethanoic acid in water.
Use the structural formula to give the functional group in ethanoic acid.
A few drops of universal indicator are added to some vinegar. Give the colour of the universal indicator in the vinegar.
A student adds vinegar to a spatula of sodium carbonate. Name the gas produced.