Binary Molecular Compounds

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Binary Molecular Compounds
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Binary Molecular Compounds

• Binary molecular compounds are composed of two
  different nonmetals
• examples CO, SO2, N2H4, P4Cl10
• These compounds are named by using a prefix to
  indicate the number of atoms of each element
  present (see table in notebook ).

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• H2O
• Dihydrogen Monoxide

4

• The prefix mono- is often omitted especially when
  the first element would have the prefix mono-
• CO
• (example CO is named carbon monoxide, not
  monocarbon monoxide).

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Name the following compounds NF3 N2O4 P4S10

• NF3 is nitrogen trifluoride
• N2O4 is dinitrogen tetroxide (Note dropped an
  'a')
• P4S10 is tetraphosphorous decasulfide

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• Write formulas for the following compounds
• dichlorine heptaoxide
• carbon hexasulfide
• octaphosphorous pentaoxide

• dichlorine heptaoxide is Cl2O7
• carbon hexasulfide is CS6
• octaphosphorous pentaoxide is P8O5

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• Acids

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Acids

• Acids are compounds that give off hydrogen ions,
  (H) when dissolved in water. When a compound
  has hydrogen as its cation the substance is
  generally an acid
• Examples HCl, H2SO4, H3PO3
• The rules for naming acids are based on the anion
  portion of the acid formula.

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Rules for Naming Acids

• The names of acids are based on the ending of the
  anion name.
• Examples HCl, H2SO4, H3PO3

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Rules for Naming Acids

• The names of acids are based on the ending of the
  anion name.
• Examples HCl, H2SO4, H3PO3
• Cl? chloride

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Rules for Naming Acids

• The names of acids are based on the ending of the
  anion name.
• Examples HCl, H2SO4, H3PO3
• Cl? chloride
• SO42? sulfate

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Rules for Naming Acids

• The names of acids are based on the ending of the
  anion name.
• Examples HCl, H2SO4, H3PO3
• Cl? chloride
• SO42? sulfate
• PO33? phophite

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Rules for Naming Acids
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Name the acids

• HNO2
• HCN
• H3PO4

nitrous acid
hydrocyanic acid
phosphoric acid
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Write formulas for the following acids

• chromic acid
• hydroiodic acid
• chlorous acid

H2CrO4
HI
HClO2
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Homework

• Do the 4 HOMEWORK (Not example) problems on the
  Binary Molecular Compounds and Acids note page.
• Do these problems on your own paper.
• Homework will be collected tomorrow.