1. Chapter 9 Chemical Names and Formulas 9.1 Naming Ions
9.2 Naming and Writing Formulas for
Ionic Compounds
9.3 Naming and Writing Formulas for
Molecular Compounds
9.4 Naming and Writing Formulas for
Acids and Bases
9.5 The Laws Governing How
Compounds Form
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2. Monatomic Ions
After Quiz:
1. Determine the charge of the cations in the following ionic compounds.
a) FeO
b) Fe2O3
c) Cu2O
d) CuO
2. Give a name to each compound above.
3. Read 9.1 in your online textbook
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3. Do Now: a) FeO Fe2+ Iron (II) Oxide Ferrous Oxide
Monatomic Ions
Do Now:
a) FeO Fe2+ Iron (II) Oxide Ferrous Oxide
b) Fe2O3 Fe3+ Iron (III) Oxide Ferric Oxide
c) Cu2O Cu Copper (I) Oxide Cuprous Oxide
d) CuO Cu Copper (II) Oxide Cupric Oxide
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4. Naming Metals That Form More Than One Ion
Monatomic Ions
Naming Metals That Form More Than One Ion
Many transition metals and Group 4A metals can form more than one type of cation
Roman numeral in parentheses indicates charge.
Examples:
Copper (I) is Cu+
Copper (II) is Cu+2
Iron (II) is Fe+2
Iron(III) is Fe+3
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5. Cadmium – only forms Cd2+ Zinc – only forms Zn2+
Monatomic Ions
Exceptions
Transition metals that only form one ion do not have a Roman numeral in their name.
Silver – only forms Ag+
Cadmium – only forms Cd2+
Zinc – only forms Zn2+
Group 4A elements that form multiple ions
Tin – forms Sn2+ and Sn4+
Lead – forms Pb2+ and Pb4+
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6. Binary Ionic Compounds
Write formulas for the following:
a) Manganese (II) Fluoride
b) Lead (II) Sulfide
c) Cobalt (III) Chloride
d) Tin (IV) Bromide
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7. Binary Ionic Compounds
Write formulas for the following:
a) Manganese (II) Fluoride MnF2
b) Lead (II) Sulfide PbS
c) Cobalt (III) Chloride CoCl3
d) Tin (IV) Bromide SnBr4
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8. Binary Ionic Compounds
Writing Formulas for Binary Ionic Compounds
Write symbols of elements.
Determine ionic charge for each symbol.
If the sum of the charges is zero, you are done.
If the sum of the charges does not equal zero, use the criss-cross method to add subscripts to balance the charges.
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9. Binary Ionic Compounds
Write names for the following:
a) Co3N2
b) Co2O3
c) Ti2S
d) CrF2
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10. Binary Ionic Compounds
Write names for the following:
a) Co3N2 Cobalt (II) Nitride
b) Co2O3 Cobalt (III) Oxide
c) Ti2S Titanium (I) Sulfide
d) CrF2 Chromium(II) Fluoride
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11. Binary Ionic Compounds
Naming Binary Ionic Compounds
Identify the two elements and name the cation and anion (anion ending must be –ide).
Does the cation have more than one possible charge? If no, write the compounds name. If yes, go to #3.
When the cation has more than one possible charge, a roman numeral is needed
• If subscripts present, do reverse criss-cross
to determine cation charge
• If no subscripts, verify that anion charge
and cation charge are exact opposites.
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12. END OF 9.1
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