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Carboxylic acids and derivatives (A-level only)

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Question 8

N-phenylethanamide can be prepared by the acylation of phenylamine using ethanoyl chloride:

CH3COCl+C6H5NH2→C6H5NHCOCH3+HCl \text{CH}_3\text{COCl} + \text{C}_6\text{H}_5\text{NH}_2 \rightarrow \text{C}_6\text{H}_5\text{NHCOCH}_3 + \text{HCl} CH3​COCl+C6​H5​NH2​→C6​H5​NHCOCH3​+HCl

In a preparation with an excess of phenylamine, the mass of ethanoyl chloride (Mr=78.5M_{\text{r}} = 78.5Mr​=78.5) used was 9.42 × 10-2 kg.

The percentage yield of N-phenylethanamide was 85%.

What mass, in grams, of N-phenylethanamide was produced?

A

47 g47\text{ g}47 g

B

138 g138\text{ g}138 g

C

162 g162\text{ g}162 g

D

191 g191\text{ g}191 g

Markscheme

Carboxylic acids and derivatives (A-level only) Questions

  1. A Level
  2. /Chemistry
  3. /Carboxylic acids and derivatives (A-level only)

22 exam-style questions on AQA A Level Chemistry Carboxylic acids and derivatives (A-level only), covering Carboxylic acids and esters (A-level only) and Acylation (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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