EstersIB MYP Chemistry: Mind map

Exam questions on Esters

1. A flavour company makes an artificial pineapple flavouring for sweets. The flavouring is an ester, made in the laboratory by heating a carboxylic acid with an alcohol in the presence of a catalyst.
   Outline how the ester is made in the laboratory, naming the catalyst.2 marks
2. A student warms ethanoic acid with propan-1-ol and a few drops of concentrated sulfuric acid in a test tube. She pours the mixture into a beaker of cold water and notices a sweet, fruity smell.
   State the role of the concentrated sulfuric acid and give one safety precaution the student should take.2 marks
3. Ethyl ethanoate is a colourless liquid used as a solvent in nail varnish remover and in some glues. A factory makes it from ethanoic acid and ethanol.
   Write a balanced symbol equation, using molecular or condensed formulae, for the formation of ethyl ethanoate from ethanoic acid and ethanol.3 marks