(a) Write the chemical equation for the formation of named alkanoate. (b)(i) What are the monomers of protein called? (ii) Write the two functional groups p...
Question 1 Report
(a) Write the chemical equation for the formation of named alkanoate.
(b)(i) What are the monomers of protein called?
(ii) Write the two functional groups present in the monomers named in (b)(i) above
(iii) State the type of reaction that leads to the formation of proteins from their monomers.
Answer Details
(a) Formation of an alkanoate (ester)
An alkanoate is formed when an alkanoic acid reacts with an alkanol in the presence of a little concentrated tetraoxosulphate(VI) acid as catalyst (esterification):
\[CH_3COOH + C_2H_5OH \underset{}{\overset{H_2SO_4}{\rightleftharpoons}} CH_3COOC_2H_5 + H_2O\]
(ethanoic acid + ethanol give ethyl ethanoate and water).
(b) Proteins
- (i) The monomers of protein are called amino acids (specifically 2-amino acids / alpha-amino acids).
- (ii) Two functional groups present in the monomers: the amino group (\(-NH_2\)) and the carboxyl group (\(-COOH\)).
- (iii) The reaction that joins the amino acids into proteins is condensation polymerization (forming peptide/amide linkages with the elimination of water molecules).
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