1a) Carboxylic acid and amine.
c)i) The dipolar ionic form of an amino acid in which the OH group in the carboxylic acid tail loses a H creating a negative charge and the amine group gains a H creating a positive charge. The two charges then cancel each other out producing no overall charge.
ii) Isoelectric point.
2a) Glutamic acid features a chiral carbon producing two steroisomers.
c)ii) Condensation reaction.
iii) Either acid or alkaline hydrolysis. Acid hydrolysis requires a concentrated acid catalyst in a hot aqueous solution and is left for 24 hours, the products are in the positive ionic form. Alkaline hydrolysis uses NaOH as a reagent in hot aqueous solution at about 100C, the products are in the form of sodium salts.
3a) A carbon bonded to four different atoms or groups producing two steroisomers of the molecule.
4a) Condensation polymerisation.
b) Ester.
5b)i) The CONH amide linkage.
ii) It is includes two alternating monomers, one containing two carboxylic acid groups, the other two amine groups whereas a protein is made from amino acids - each containing one carboxylic group and one amine group.
6a) Prop-2-enoic acid.
b) Iodoethene.
c) Benzene 1,4-dioic acid and ethane-1,2-diamine.
Hi, my name is Juliet and I am revising chemistry.
