Chemical Names and Formulas

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Presentation transcript:

Chemical Names and Formulas 9.2: Naming and Writing Formulas for Ionic Compounds

Writing Formulas of Binary Ionic Compounds Write the symbol of the cation then anion Add subscripts to balance charges (criss cross) Potassium chloride = KCl Iron (III) Oxide = ? Copper (II) Sulfide = ? Potassium Nitride = ?

Naming Binary Ionic Compounds Cation name first, then the anion. NaBr = Sodium Bromide CaCl2 = ? CuO = Copper (II) Oxide SnF2 = ?

Compounds with Polyatomic Ions Watch for the –ite or –ate endings Write the symbol for the cation then the formula for the polyatomic ion Balance the charges (criss cross) Sodium nitrate = NaNO3 Lithium carbonate = ? Ammonium sulfate = ?

The Other Way To name a compound containing a polyatomic ion, state the cation then the anion. Mg(NO3)2 = Magnesium Nitrate (NH4)2C2O4 = ? Ca3(PO4)2 = ? CaSO4 = ?