Write the name from the formula or the formula from the name for each hydrated ionic compound.
a. CoSO₄•7 H₂O
b. iridium(III) bromide tetrahydrate
c. Mg(BrO₃)₂•6 H₂O
d. potassium carbonate dihydrate

Key Concepts

Hydrated Ionic Compounds

Hydrated ionic compounds are salts that incorporate water molecules into their crystalline structure. The water molecules are typically represented in the formula as 'n H2O', where 'n' indicates the number of water molecules associated with each formula unit of the salt. Understanding hydration is crucial for identifying the physical properties and reactivity of these compounds.

Nomenclature of Ionic Compounds

The nomenclature of ionic compounds involves naming the cation (positive ion) and anion (negative ion) according to established rules. For hydrated compounds, the name includes the prefix indicating the number of water molecules, such as 'hemi-' for one-half, 'mono-' for one, 'di-' for two, and so on, followed by 'hydrate'. This systematic approach helps in accurately communicating the identity of the compound.

Chemical Formula Representation

Chemical formulas represent the composition of a compound, indicating the types and numbers of atoms present. In the case of hydrated ionic compounds, the formula includes both the ionic part and the associated water molecules, as seen in Mg(BrO3)2 · 6 H2O. Understanding how to interpret and write these formulas is essential for correctly identifying and working with chemical substances.