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Unit 4

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

Acyl chlorides + water form?

Back (Answer)

Carboxylic acid + HCl gas (misty fumes)

#2
Front (Question)

Acyl chlorides + alcohol ->

Back (Answer)

Ester + HCl gas

#3
Front (Question)

Acyl chlorides + concentrated ammonia

Back (Answer)

Amide (-CONH2) + HCl Further reaction to NH4Cl

#4
Front (Question)

Acyl chlorides + primary amine

Back (Answer)

N-substituted (RCONHR’) + HCl

#5
Front (Question)

Acyl chlorides + secondary amines ->

Back (Answer)

N,N-disubstituted amide (RCONH(R’)(R”) + HCl

#6
Front (Question)

Carboxylic acid + alcohol ->

Back (Answer)

In presence of acid catalyst (H2SO4) ester + H2O

#7
Front (Question)

Physical properties of esters

Back (Answer)

Low boiling point Insoluble in water Pleasant smells

#8
Front (Question)

Carboxylate salt (-COO-) COO with negative charge and a positive ion + H2SO4 ->

Back (Answer)

Carboxylic acid + metal salt

#9
Front (Question)

Types of reverse esterification

Back (Answer)

Acidic hydrolysis Alkaline hydrolysis

#10
Front (Question)

How to do acidic hydrolysis in esters

Back (Answer)

Ester + warm water -> (acid catalyst H2SO4) carboxylic acid + alcohol It is an equilibrium for and backward arrow needed

#11
Front (Question)

Alkaline hydrolysis in esters

Back (Answer)

Ester + NaOH -> carboxylate salt + alcohol Complete reaction

#12
Front (Question)

What happens in condensation polymerisation

Back (Answer)

Diol (two OH groups at each end + dicarboxylic acid -> polyester + H2O OH from COOH and H from OH (Acyl chlorides can be used to form HCL)

#13
Front (Question)

Stationary phase in chromatography

Back (Answer)

Liquid/ solid that does not move

#14
Front (Question)

Mobile phase in chromatography

Back (Answer)

Liquid moves through stationary phase transporting the substance tested

#15
Front (Question)

How do mobile and stationary allow chromatography to separate solvents

Back (Answer)

Chemicals more attracted to stationary phase and only slightly attracted to mobile phase will move less up the paper

#16
Front (Question)

Mobile phase in Paper chromatography

Back (Answer)

Solvent

#17
Front (Question)

Mobile phase in TLC chromatography

Back (Answer)

Solvent

#18
Front (Question)

Stationary phase in paper chromatography

Back (Answer)

Water trapped in the fibres of chromatography paper

#19
Front (Question)

Stationary phase in TLC chromatography

Back (Answer)

Sheet of glass coated with silica or alumina

#20
Front (Question)

Stationary phase of column chromatography

Back (Answer)

Alumina or silica soaked in solvent

#21
Front (Question)

Mobile face in solemn chromatography

Back (Answer)

The solvent added when pouring the mixture of top of the stationary phase

#22
Front (Question)

How is HPLC chromatography different to column chromatography

Back (Answer)

Solvent is forced through HPLC tube by high pressure

#23
Front (Question)

Stationary phase in HPLC chromatography

Back (Answer)

silica

#24
Front (Question)

What does a polar substance attract

Back (Answer)

Polar molecules