Studied by 0 peoplePyruvic acid, shown below, is an organic compound that has a smell similar to ethanoic acid. It is extremely soluble in water.
Explain why pyruvic acid is soluble in water.
Use a labelled diagram to support your answer. (2 marks)
Compound A, C4H8O3, can lose water to form either:
Compound B, a cyclic ester
OR
Compound C, a polyester
identify compounds A,B and C (3 marks)
A student carries out a reaction using the same reagents as in part (g), but by heating the reaction mixture under reflux. Compound C is produced.
Explain what is meant by the term heating under reflux (2 marks)
To boil a liquid (1 marks)
With a vertical/upright condenser
OR allowing liquid to drop back into the flask
OR without liquid boiling away
OR prevent loss of products
Write equations for the following reactions:
propanoic acid with sodium hydroxide
Butanoic acid with sodium carbonate
Sodium methanoate with hydrochloric acid
Sodium ethanoate with sulphuric acid
2- methylpropanoic acid with sodium carbonate
Write an equation for the reaction of butan-2-ol with ethanoic acid, showing clearly the structure of the organic product.
Name the type of organic product formed and suggest a use for this compound.
Write an equation (word and displayed) for the formation of propanoyle chloride from propanoic acid.
Note
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