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Methods of separating and purifying substances

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Question 14

An analytical chemist measures the melting point of three different recrystallised batches of benzoic acid, labelled A, B, and C. The measured melting point data is recorded in the table below.

BatchMelting point / °C
A112–117
B122
C115–119

Determine whether each batch is pure or impure, and justify your conclusions using the information provided.

[3]

Methods of separating and purifying substances Questions

  1. GCSE
  2. /Chemistry
  3. /Methods of separating and purifying substances