Question

Explain why melting and boiling points can be used as a way to check purity

Answer 1

Answer:

Fractional distillation is a technique used to separate impurities. - Usually impurities have lower melting/boiling point, thus evaporates earlier can be removed. - However, pure compounds have high melting/boiling points and evaporates very slowly. - This is how we can check purity of compounds (usually fuels).

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