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EstersIB MYP Chemistry: Flashcards

What these 13 flashcards ask

  • What is the functional group of an ester?
  • Which two types of compound react to make an ester?
  • What is the name of the reaction that makes an ester?
  • Which catalyst is used in esterification?
  • What is the other product of esterification?
  • Which part of an ester name comes from the alcohol?
  • Which ending does the acid part of an ester name have?
  • Name the ester made from methanol and ethanoic acid.
  • Write the formula of ethyl ethanoate.
  • Give a typical smell of esters.
  • Why are esters used in perfumes?
  • Give two uses of esters other than perfumes.
  • Why is esterification not 100% complete?

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
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Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).