Edexcel A-Level Chemistry A2 19.5 The Preparation of Aromatic Amines By the Reduction of Aromatic Nitro Compounds Using Tin and Concentrated Hydrochloric Questions
Practise Edexcel IAL Chemistry 19.5 by selecting tin or iron with concentrated hydrochloric acid, identifying nitro-to-amine reduction and sequencing the work-up.
Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2
Exam points
State Sn or Fe with concentrated HCl for reducing aromatic nitro compounds.
Identify the conversion of nitrobenzene to phenylamine as reduction or redox.
Avoid mixing NaOH into the initial Sn/HCl reduction step when choosing reagents.
Edexcel A-Level Chemistry A2 19.5 The Preparation of Aromatic Amines By the Reduction of Aromatic Nitro Compounds Using Tin and Concentrated Hydrochloric Questions question 1
[Maximum number: 1]
The synthetic drugs of the 'Caine' family are used as local anaesthetics. Caine drugs prevent nerve activity by binding to sodium channel receptors in the lipid cell membranes of neurons.
benzocaine
procaine
lidocaine
articaine
Lidocaine can be prepared in the synthesis shown.
Step 1
Step 3
lidocaine
Give the reagents for Step 2.
An answer that makes reference to the following point:
- tin and (concentrated) hydrochloric acid
Accept Sn and HCl((aq))
Ignore heat / reflux Ignore NaOH in second step
Do not award NaOH with Sn and HCl in the same step Do not award any reference to catalyst