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Naming Compounds Having Polyatomic Ions

Naming Compounds Having Polyatomic Ions. Objective: To learn the names of common polyatomic ions and how to use them in naming compounds. Define polyatomic ion. A group of atoms with a charge Some Examples SO 4 2- CN - C 2 H 3 O 2 - sulfate cyanide acetate

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Naming Compounds Having Polyatomic Ions

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  1. Naming Compounds Having Polyatomic Ions Objective: To learn the names of common polyatomic ions and how to use them in naming compounds.

  2. Define polyatomic ion • A group of atoms with a charge • Some Examples • SO42- CN- C2H3O2- • sulfate cyanide acetate • OH- NO3- NO2- • Hydroxide nitrate nitrite

  3. Polyatomic vs. Monatomic • How are the ions S2- and SO42- different? • SO42- is five atoms combined to make one ion. • SO43- is a polyatomic ion

  4. Turn to page 100 • Note the table listing the most common polyatomic ions. • This table will be supplied to you when you take the test. • Let’s look at it.

  5. What do you notice about the names of most polyatomic ions? • Most end with either –ite or –ate. • Notice there are some that end in -ide.

  6. Perchlorate ClO4- • chlorate ClO3- • chlorite ClO2- • hypochlorite ClO- • Chloride Cl-

  7. Naming Compounds that Contain Polyatomic Ions • Say the name of the positive ion • Say the name of the negative ion • Na2SO3 K2SO4 • sodium sulfite potassium sulfate • KC2H3O2 • Potassium acetate

  8. This will be easier if you remember this: • Compounds only have two names • CuCO3 • Copper(II) carbonate

  9. Compounds Containing SO42- • The name of the polyatomic ion is sulfate • BaSO4 Al2(SO4)3 • barium sulfate aluminum sulfate • CaSO4 Na2SO4 • calcium sulfate sodium sulfate

  10. Compounds Containing OH- • The name of the polyatomic ion is hydroxide • NaOH Cu(OH)2 • sodium hydroxide copper(II) hydroxide • Al(OH)3 Fe(OH)2 • aluminum hydroxide Iron(II) hydroxide

  11. Compounds Containing C2H3O2- • Ba(C2H3O2)2 Cu(C2H3O2)2 • Barium acetate copper(II) acetate • Mg (C2H3O2)2 Hg2(C2H3O2)2 • Magnesium acetate mercury(I) acetate

  12. Compounds Containing H2PO4-The name of the polyatomic ion is dihydrogen phosphate. • NaH2PO4 • Remember: Say the name of the positive ion and then the name of the negative ion. • Sodium dihydrogen phosphate

  13. Writing Formulas of Compounds that Contain Polyatomic Ions • Sodium phosphate

  14. Write the Formula for Barium Nitrate • Barium Nitrate

  15. Write the Formula for Calcium Hydroxide • Calcium Hydroxide

  16. Write the Formula for Calcium chloride • Only put parentheses around polyatomic ions

  17. Write the formula for ammonium carbonate • ammonium carbonate

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