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Acid anions: substances that provide H+ ions. HPO 4 2- (PO 4 3- phosphate ion)

Acid anions: substances that provide H+ ions. HPO 4 2- (PO 4 3- phosphate ion) Monohydrogen phosphate ion. Thiosulfate ion S 2 O 3 2- Thio - oxygen atom in the root ion name (SO 4 2-) has been replaced by a sulfur atom Mercury is not monatomic….Hg22+ Mercury(I ) ion. Example 2.4 2.5.

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Acid anions: substances that provide H+ ions. HPO 4 2- (PO 4 3- phosphate ion)

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  1. Acid anions: substances that provide H+ ions. • HPO42- • (PO43- phosphate ion) • Monohydrogen phosphate ion.

  2. Thiosulfate ion • S2O32- • Thio- oxygen atom in the root ion name (SO42-) has been replaced by a sulfur atom • Mercury is not monatomic….Hg22+ • Mercury(I) ion

  3. Example 2.4 2.5

  4. BINARY MOLECULAR COMPOUNDS • Binarycmpd: composed of only two elements. • Molecular: usually two nonmetals or two metalloids, named using a prefix system. • Generally name the two elements using the order given by the formula of the compound.

  5. ORDER OF ELEMENTS IN THE FORMULA • Usual order places the nonmetals and metalloids in order of increasing nonmetallic character. • First element is the more metallic, second element is the more nonmetallic. • Ex. NF3 not F3N

  6. Rules for Naming Binary Molecular Cmpds. • in order of the order given in the formula. • Name first element using the exact element name. • Name the second element stem + ide • Prefix to denote the subscript of the element, mono- rarely used

  7. Greek prefixes for naming cmpds. Number/Prefix • mono- • Di- • Tri- • Tetra- • Penta- • Hexa- • Hepta- • Octa- • Nona- • Deca-

  8. Ex. N2O3 Dinitrogen trioxide HCl Hydrogen chloride CO Carbon monoxide CO2 Carbon dioxide

  9. ClO2 Chlorine dioxide Cl2O7 Dichlorinehept(a)oxide ---- heptoxide Drop the vowel

  10. Exceptions H2S --- hydrogen sulfide NO --- nitric oxide NH3 --- ammonia H2O --- water

  11. Review N2O4 Dinitrogentetroxide P4O6 Tetraphosphorushexoxide

  12. Review • Disulfur dichloride • Tetraphosphorustrisulfide S2Cl2 P4S3

  13. Ex. 2.8 Pg. 56

  14. Worksheet

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