1. Chemistry 1K Notes Addendum
Hydrate Nomenclature
Chemistry 1K Notes Addendum

2. Naming Hydrates To name a hydrate:
Prefix
Number
Mono 1 Di 2
Tri 3
Tetra 4
Penta 5
Hexa 6
Hepta 7
Octa 8
Nona 9
Deca 10
Many solid compounds release water when heated at low temperatures.
In these compounds, called hydrates, water molecules are loosely bonded within the solid crystal at regular intervals.
 A common example of a hydrate is: CuSO4 •5H2O
Where the compound is written first, followed by a dot (representing a weak bond) and then the number of water molecules that hydrate the compound
To name a hydrate:
Name the compound (according to the rules previously discussed)
The choose the prefix in the table to the right that indicates the number of water molecules.
Add the word “hydrate” to the end of the prefix.
A common example of a hydrate is: CuSO4 •5H2O
Copper(II) sulfate pentahydrate

3. Naming Hydrates Practice
Name each hydrate:
Li2SO4 ∙ 10H2O
Pb(OH)4 ∙ 7H2O
Cs2CO2 ∙ 2H2O
Write the formula for each hydrate:
vanadium (III) bromide tetrahydrate
strontium nitrate pentahydrate
calcium carbonate trihydrate
lithium sulfate decahydrate
lead (IV) hydroxide heptahydrate
cesium carbonite dihydrate
VBr3 ● 4H2O
Sr(NO3)2 ● 5H2O
CaCO3 ● 3H2O