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Dry Lab 2C p' 132

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Ternary Acids (Oxoacids) - compounds of hydrogen and a polyatomic anion. ... If the anion is named -ate, the acid is named using -ic. ... – PowerPoint PPT presentation

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Title: Dry Lab 2C p' 132


1
Dry Lab 2C p. 132
  • To name and write formulas for salts and acids
    containing polyatomic anions.
  • To name and write formulas for acid salts.
  • Acid salts are salts in which a metal cation
    replaces less than all of the hydrogens of an
    acid having more than one hydrogen (a polyprotic
    acid).

2
Dry Lab 2C Introduction
  • Many polyatomic anions consist of one element
    (usu. a nonmetal) and oxygen the entire group
    carries a negative charge. To name the anion use
    the root name of the non-oxygen
  • SO42- - sulfate ion
  • NO3- - nitrate ion

3
Dry Lab 2C Introduction
  • If an element and oxygen form two polyatomic
    anions, the anion with the element having the
    higher oxidation number uses the -ate suffix
    while the anion with the element having the lower
    oxidation number uses the -ite suffix.
  • SO42- - S 6 sulfate (higher)
  • SO32- - S 4 sulfite (lower)

4
Dry Lab 2C Introduction
  • If more than 2 polyatomic anions are formed from
    an element and oxygen, the prefixes per- and
    hypo- are added.
  • This happens most often among the polyatomic
    anions with a halogen as the element
  • perchlorate - charge on Cl 7
  • chlorate - charge on Cl 5
  • chlorite - charge on Cl 3
  • hypochlorite - charge on Cl 1

5
Dry Lab 2C Introduction
  • Ternary Acids (Oxoacids) - compounds of hydrogen
    and a polyatomic anion. Naming these acids does
    not include the hydrogen. If the anion is named
    -ate, the acid is named using -ic. If the anion
    is -ite, the acid is named using -ous.
  • SO42- - sulfate ion H2SO4 - sulfuric acid
  • SO2- - sulfite ion H2SO3 - sulfurous
    acid

6
Dry Lab 2C Introduction
  • Acid salts are salts in which a metal cation
    replaces less than all of the hydrogens of an
    acid having more than one hydrogen (polyprotic
    acid).
  • NaHSO4 - sodium hydrogen sulfate
  • CaHPO4 - calcium hydrogen phosphate
  • NaHS sodium hydrogen sulfide

7
Dry Lab 2C - Procedure/Questions
  • Part 1 a, c, e, g
  • Part 2 a, c, e, g
  • Part 3 a, c, e, g
  • Part 4 a, c, e, g
  • Part 5 a, c, e, g
  • Part 6 a, c, e, g, h
  • Part 7 a, c, e, g
  • Part 8 e, r
  • Hand in on notebook paper, next weeks lab.
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