How can I find the formulas for common hydrates of an ionic compound?

How many water molecules are bound per formula unit in the common hydrates of strontium chloride, sodium chromate, nickel(II) nitrate, and iron(II) ammonium sulfate?
Mark 10/23/99

Vocabulary
hydrate*
ionic compound*
Your best bet for finding common hydrate formulas is to search for the compound by name (not by formula) in chemical catalogs. For example, a quick search at Fisher Scientific revealed the that strontium chloride and nickel(II) nitrate occur commonly as hexahydrates.

Author: Fred Senese senese@antoine.frostburg.edu



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