Pages in this set

Page 1

Preview of page 1
Carboxylic Acids ­ Answers


1. Carboxylic acids contain the group , known as the carboxyl group, as it consists of the carbonyl group,
C=O, and the hydroxyl group, OH.
2. Carboxylic acids are found in a number of fruits and vegetables:
Citric acid is a tribasic acid with skeletal formula:…

Page 2

Preview of page 2
v. Iodoform Reaction of a Methyl Ketone or Secondary Alcohol ­ On addition of a solution of iodine in aqueous
sodium hydroxide to a methyl ketone (e.g. butanone, CH3CH2COCH3), the salt of the acid with one fewer carbon
atoms is produced (propanoic acid, CH3CH2COOH). The free carboxylic acid is formed…

Page 3

Preview of page 3
Solubility: They are soluble in several organic solvents, but react with water (often violently) so can't be
dissolved in it
16. Acid chlorides are prepared from carboxylic acids. The ­OH group is replaced by a chlorine atom. The reagents
that can be used are phosphorus pentachloride, phosphorus trichloride or thionyl…

Page 4

Preview of page 4
27. Esters are hydrolysed when heated under reflux with either aqueous acid or aqueous alkali:

CH3COOC2H5 + H2O CH3COOH + C2H5OH
Here, the acid is a catalyst and the reaction is reversible, therefore the yield of acid and alcohol is low.
CH3COOC2H5 + NaOH CH3COONa + C2H5OH
This reaction is…

Page 5

Preview of page 5
37. A condensation polymer is formed when monomers join together with the elimination of a simple molecule, such
as water of HCl. Polyesters are condensation polymers. The monomers that condense must have two groups,
one at each end of the molecule.
38. A polyester is formed ia dicarboxylic acid, such…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »