CH-462
Purity and melting point
Chemistry · Secondary 3 · Medium · Purity and melting point
A sample of sodium chloride is tested for purity by measuring its melting point. Pure sodium chloride melts at 801 °C. The sample starts melting at 790 °C and finishes melting at 780 °C. What does this show?
- The sample is pure sodium chloride.
- The sample is impure sodium chloride.
- The sample is not sodium chloride at all.
- The sample is a pure element.
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