Impurities in a substance will affect its properties. For example, they may change its boiling point. A mixture contains different substances that are not chemically joined to each other.

Like real gold and Fool’s gold. But what if my sample has several different types of elements and compounds all mixed together? Matter can also be classified as a mixture. Mixtures can either be ...

In quality control and chemistry, analytical samples are usually mixtures. Understanding the main compound’s assay and the number of impurities or other unwanted substances in the sample is ...