Bremner, J. M., Methods of Soil Analysis, edit. by Black, C. A. (Amer. Soc. Agron., Madison) (in the press).

Most materials that we use are mixtures, and just a few are pure elements or pure compounds. In chemistry, a pure substance is a single substance made of only one type of particle. Dissolving A ...

The word 'pure' is used in chemistry in a different way from its everyday meaning. For example, shops sell cartons labelled as ‘pure' orange juice. The label means that the contents are just ...