# Question #035a0

Apr 17, 2016

I think the clue to both of these understanding the meaning of the first word.

#### Explanation:

Taking each question in turn: " hydrate, compound, water "

A hydrate is a substance formed by combination of a compound with water. In inorganic chemistry, these are usually ionic salts with water molecules loosely attached.

An example of the formula of such a substance is : $M g S {O}_{4.} {\left({H}_{20}\right)}_{7}$ (this is 7 loosely bound water molecules around the magnesium and sulphate ions).