CH-392
Purity and melting point
Chemistry · Secondary 3 · Medium · Purity and melting point
A sample of solid X melts sharply at 121 °C. Another sample of X melts over the range 115–120 °C.
What is the most likely reason for the difference in melting behaviour?
What is the most likely reason for the difference in melting behaviour?
- The second sample was heated too quickly.
- The second sample is impure.
- The first sample was cooled before melting.
- The thermometer used for the second sample was faulty.
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