minds on… list the following compounds in order from lowest boiling point to highest boiling...
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Minds On…• List the following compounds in order from LOWEST boiling
point to HIGHEST boiling point.Methanol (CH3OH) Propane (C3H8) Pentane
(C5H12)
• Give reasons for your choice
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Nomenclature: Part II
LG: I can name and write formulas for multivalents, polyatomics and hydrates
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Multivalents: Classical Naming• In the classical system, multivalent are named by
adding different suffixes to the Latin name of an element– “-ic” indicates the higher charge– “-ous” indicates the lower charge
• Latin Names:– Iron: Ferric (3+) Ferrous (2+)– Copper: Cupric (2+) Cuprous (1+)– Tin: Stannic (4+) Stannous (2+)– Lead: Plumbic (4+) Plumbous (2+)
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Practice• Name each of the following with the IUPAC
name and Classical nameFeCl2
PbOSnS2
CuF2
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Polyatomic CompoundsNaming Rules
– Name the cation first– Name the anion
second– Example: Mg(OH)2
Formulas for compounds– Use “Teeter-Totter” to
balance +ve and –ve charges– Example: Lead (IV) Sulfate
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Oxyanions• Oxyanions are polyatomic compounds that
contain oxygen (ie. NO3-, SO3
2-)– Number of oxygens determines prefix and suffix of
ion name– Example:
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Hydrates• A hydrate is a compound that contains water
molecules within its crystal structure.
• When heat is applied, hydrates will decompose to produce water vapour and an ionic compound
CuSO45 H2O CuSO4 + 5 H2O
• When the water is removed, the remaining ionic compound is referred to as anhydrous.
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Naming Hydrates• The IUPAC name for hydrates uses Greek
prefixes to indicate the number of water molecules.
CuSO45 H2O = Copper (II) Sulfate Pentahydrate
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Homework
• Old Text: Pg 96-97 # 16-21