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Naming Binary compounds when the first element has more than one valence.

Naming Binary compounds when the first element has more than one valence. Use I.U.P.A.C., -ous/-ic, or Greek prefix method. I.U.P.A.C. Method (Stock method). The valence of the first element is indicated by a Roman numeral in brackets following the name of the element. Antimony (III) chloride

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Naming Binary compounds when the first element has more than one valence.

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  1. Naming Binary compounds when the first element has more than one valence. Use I.U.P.A.C., -ous/-ic, or Greek prefix method

  2. I.U.P.A.C. Method (Stock method)

  3. The valence of the first element is indicated by a Roman numeral in brackets following the name of the element.

  4. Antimony (III) chloride Sb3+ Cl – SbCl3 Arsenic (V) sulphide As5+ S2– As2S5 Write the formula for:

  5. -ous/-ic Method • 1. Use –ous ending if first element has a lower valence • 2. Use –ic ending if first element has a higher valence

  6. Name the following • Example 1: • MnO • Mn -> +2 • O -> -2 • Mn can be +2 or +4 • - manganous oxide

  7. Example 2: MnO2 Mn -> +4 O -> -2 Manganic oxide Example 3: N2O3 N -> +3 O -> -2 N can be +3 or +5 Nitrous oxide

  8. In this method, the following elements are named in Latin: • Copper cuprous (+1) cupric (+2) • Iron ferrous (+2) ferric (+3) • Tin stannous (+2) stannic(+4) • Lead plumbous (+2) plumbic(+4)

  9. FeCl2 Fe -> +2 Cl -> -1 Ferrous chloride CuO Cu -> +2 O -> -2 Cupric oxide Name the following:

  10. Write the formula for: • Example 1: mercuric oxide • the higher valence for mercury is +2, oxygen is –2 • HgO • Example 2: ferrous oxide • The lower valence for iron is +2, sulphur is –2 • FeS

  11. MONO DI TRI TETRA PENTA HEXA HEPTA OCTA NONA DECA Greek Prefix:Use a greek prefix to indicate how many atoms are in the compound

  12. Name the following: Example 1: SO2 monosulphur dioxide -> sulphur dioxide Example 2: Al2O3 dialuminum trioxide Example 3: H2O dihydrogen monoxide

  13. Write the formula for: • Example 1: dinitrogen difluoride N2F2 Example 2: diphosphorus pentoxide P2O5 Example 3: carbon monoxide CO

  14. Homework: • 1. Complete handout page 4 from booklet • 2. Page 103 #21 a, b, e, f • 3. Page 105 #24 • 4. Page 106 #2 • 5. Page 108 #19 a, b, c, e, f

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