What are the 2 methods to determine the purity of a substance?

09/10/2020 at 2:47 pm (last edited 09/10/2020 at 2:48 pm)

To determine the purity of a substance, test its melting point or boiling point.

If it melts or boils at a fixed temperature, it is a pure substance.

Another method is to carry out a chromatography of the substance.

If it separates out into only one spot on the chromatogram, it is a pure substance.