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Nomenclature. Tertiary (or Ternary) Acids. Ternary Acids. Ternary = 3 elements in compound Acid = Hydrogen usually present as H 1+ ion Also called “ Oxyacid ” because oxygen also present Recognize formula as H Nonmetal O Examples: HNO 3 H 3 PO 4. 6 Model Ternary Acids.
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Nomenclature Tertiary (or Ternary) Acids
Ternary Acids • Ternary = 3 elements in compound • Acid = Hydrogen usually present as H1+ ion • Also called “Oxyacid” because oxygen also present • Recognize formula as H Nonmetal O • Examples: HNO3 H3PO4
6 Model Ternary Acids • Memorize these 6 example formulas and names on periodic table to represent groups 13-17 13 14 15 16 17 H3 B O3 H2 C O3 H N O3 Boric Carbonic Nitric acid acid acid H3 P O4 H2 S O4 H Cl O3 Phosphoric Sulfuric Chloric acid acidacid
Naming Ternary Acids • Notice all these example acids ended with suffix –ic • There is noprefix “hydro” because not binary acid • Notice the exact number of oxygens in each model for each group • Group 15 follows Phosphoric acid model
Your Turn to Try • Write the name and formula for each element based on the group model • Ge • Br • Se • As
System of Varying Oxygen • Study the pattern of how prefix and/or suffix change as the number of oxygens in the formula change H2CO4 Percarbonic acid Added extra oxygen H2CO3 Carbonic acid Model formula 3 oxygens H2CO2 Carbonous acid Removed 1 oxygen H2CO Hypocarbonous acid Removed 2 oxygens
Your Turn to Complete Chart • Write all possible formulas and names for the elements N and S
Your Turn to Complete Chart • Write all possible formulas and names for the elements Si and Te