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Chapter 9 – Chemical Names and Formulas

Naming Ionic Compounds. Chapter 9 – Chemical Names and Formulas. Naming Ions. Monoatomic Ions:. monoatomic means 1 atom, like the ones we have studied already. Cations:. Anions:. just the name of the element. add an -ide ending.

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Chapter 9 – Chemical Names and Formulas

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  1. Naming Ionic Compounds Chapter 9 – Chemical Names and Formulas

  2. Naming Ions Monoatomic Ions: monoatomic means 1 atom, like the ones we have studied already Cations: Anions: just the name of the element add an -ide ending Always name ionic compounds with the Cation name and then the Anion name.

  3. Put it together to name a compound Examples: 1. LiCl 2. MgO 3. AlBr3 4. KS2 5. BeF2 Lithium Chloride Magnesium Oxide Aluminum Bromide Potassium Sulfide Beryllium Fluoride

  4. Ions of Transition Metals Transition metals are not as easy as the representative elements. Their charge varies from +1 to +4, and many will form more than one different ion. Naming these beasts: Old School – A different name for each charge! ex) Cu1+ - cuprous ion Fe2+ - ferrous ion Cu2+ - cupric ion Fe3+ - ferric ion

  5. Ions of Transition Metals (Cont...)‏ Fortunately, that method is not as commonly accepted anymore, but you still see it here and there Newer Method: State the name of the element followed by its charge in a roman numeral ex) Pb2+ Lead (II) Ion Cu+ Copper (I) Ion Pb4+ Lead (IV) Ion Cu2+ Copper (II) Ion

  6. Putting it together to name compounds ex) CuF2 1st determine the charge on the transition ion In this case, it is Cu2+ 2nd (and lastly) name the compound by naming the cation first and then the anion Copper (II) Fluoride

  7. Name the following compounds: 1. PbO2 2. PbCl3 3. FeN 4. MnS 5. Sn3N4 Lead (IV) Oxide Lead (III) Chloride Iron (III) Nitride Manganese (II) Sulfide Tin (IV) Nitride

  8. Polyatomic Ions They are ions composed of more than one atom They have a charge of -1, -2, -3, or +1 The charge applies to the whole group of atoms, not the last one! Use parenthesis to separate the ion when writing

  9. Naming Compounds with Polyatomic Ions Cu2+ and SO32- CuSO3 Copper (II) Sulfite Hg2+ and PO33- Hg3(PO3)2 Mercury (II) Phosphite NH4+ and C2O42- (NH4)2C2O4 Ammonium Oxalate

  10. Practice Problems p263 #10-11 p265 #12-13 p266 #17-19

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