Chemical Naming

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Chemical Naming
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Ionic Compounds

• Ion- an atom that has a positive or negative
  charge.
• The only particle lost or gained when forming
  ions is the e-.
• Cation
• Positively charged ion (lost an e-)
• Anion
• Negatively charged ion (gained an e-)

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Naming Ionic Compounds

• Cation is always written first
• In name and in formula
• Anion is written second.
• Change the ending to -ide
• Balance Charges
• Overall charge must equal zero

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Practice with Ionic Naming
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Write Balanced Ion Pairs
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Write the Formula
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Name the compound
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Naming Short cut
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More Practice with Ionic Naming
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Write balanced ion pairs
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Write the formula
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Name the compound
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Naming with Polyatomic Ions

• Polyatomic ions
• Composed of 2 or more elements that act as a
  unit.
• Have a positive or negative charge.
• Most are anions (negative charge)
• Most end in -ite/-ate
• Name the same way as binary ionic compounds, but
  use the polyatomic ion name.

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Polyatomic Ions
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Naming with Polyatomic Ions
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Write Balanced Ion Pairs
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Write the formula
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Name the compound
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Write the formula

• Name
• Aluminum Nitrate
• Balanced Ion Pairs Formula

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Write the formula

• Name
• Aluminum Nitrate
• Balanced Ion Pairs Formula
• 2Al3 3NO3-2 Al2 (NO3)3

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Naming with Transition Metals

• Transition Metals have various valences. (Refer
  to chart)
• Valence (or charge) is indicated by a roman
  numeral.
• Iron III Fe 3
• Iron II Fe2

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Ion charges
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Naming with Transition Metals

• The Roman Numeral tells you the charge on the
  metal ion, not the number of metal ions present.
• Write balanced ion pairs to determine formula

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Naming with Transition Metals
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Naming with Transition Metals
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Naming with Transition Metals
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More Naming Practice with Transition Metals
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More Naming Practice with Transition Metals
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More Naming Practice with Transition Metals
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Molecular Compounds

• Compounds where
• both elements have negative charges
• both from right side of the periodic table
• both are non-metals
• Electrons are not transferred, they are shared

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Naming Molecular Compounds

• Rules for naming molecular compounds
• 1st element has normal name
• 2nd element has ending changed to -ide
• use prefixes to say how many of each element
• Do not use a prefix with the first element if
  there is only one.

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Molecular Naming Prefixes

• 1 mono 6 hexa
• 2 di 7 hepta
• 3 tri 8 octa
• 4 tetra 9 nona
• 5 penta 10 deca

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Name the compounds
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Name the compounds
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Write the formulas

• dinitrogen monoxide
• phosphourus trichloride
• sulfur hexafluroride
• carbon disulfide
• carbon tetrabromide
• dinitrogen tetrahydride
• boron trichloride
• diphosphourus trioxide
• hexaselenium monochloride

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Write the formulas

• dinitrogen monoxide N2O
• phosphourus trichloride PCl3
• sulfur hexafluroride SF6
• carbon disulfide CS2
• carbon tetrabromide CBr4
• dinitrogen tetrahydride N2H4
• boron trichloride BCl3
• diphosphourus trioxide P2O3
• hexaselenium monochloride S6Cl

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Naming Acids

• Acids are ionic compounds (cation anion)
• H is the cation
• All acids start with H
• When acids dissolve into ion pairs, they produce
  and H
• HCl ? H Cl-
• HNO3 ? H NO3-

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Naming Acids

• When the name of the anion ends in ide, the acid
  name begins with the prefix hydro-, the stem of
  the anion has the suffix ic and it is followed
  by the word acid.
• HCl hydrochloric acid.
• When the anion name ends in ite, the acid name
  is the stem of the anion with the suffix ous,
  followed by the word acid. 
• HClO2 Chlorous acid.
• When the anion name ends in ate, the acid name
  is the stem of the anion with the suffix ic,
  followed by the word acid. 
• HClO3 Chloric acid

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Practice Naming Acids
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Name the anion
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Write the Formula
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Name the acid
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Naming Acids

• When the name of the anion ends in ide, the acid
  name begins with the prefix hydro-, the stem of
  the anion has the suffix ic and it is followed
  by the word acid. HCl hydrochloric acid.
• When the anion name ends in ite, the acid name
  is the stem of the anion with the suffix ous,
  followed by the word acid.  H2ClO2. Chlorous
  acid.
• When the anion name ends in ate, the acid name
  is the stem of the anion with the suffix ic,
  followed by the word acid.  H2ClO3 Chloric acid