CH-526
Purity and melting point
Chemistry · Secondary 3 · Medium · Purity and melting point
A student measures the melting point of a solid. The temperature rises from 54 °C to 56 °C while the solid is melting. Which conclusion about the sample is correct?
- It is impure because it melts over a range of temperatures.
- It is pure because it melts completely.
- It is pure because its melting point is below 100 °C.
- It is impure because it is a solid at room temperature.
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