Cambridge IGCSE Chemistry · Syllabus 0620 · Acids, Bases and Salts
Anhydrous Substance
What is Anhydrous Substance?
A substance that contains no water. Anhydrous copper(II) sulfate, CuSO4, is a white powder and anhydrous cobalt(II) chloride, CoCl2, is blue; each is formed by heating the corresponding hydrated crystals.
This definition is part of the Acids, Bases and Salts chapter in Cambridge IGCSE Chemistry.