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January 15, 2014 Brain Bender

January 15, 2014 Brain Bender. What does the prefix “poly” mean? Considering that, what do you think a polyatomic ion is?. Naming Ionic Compounds with Polyatomic Ions. Complex Ionic Compounds. Polyatomic Ions:. “Poly” – many/multiple/more than one

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January 15, 2014 Brain Bender

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  1. January 15, 2014Brain Bender What does the prefix “poly” mean? Considering that, what do you think a polyatomic ion is?

  2. Naming Ionic Compounds with Polyatomic Ions Complex Ionic Compounds

  3. Polyatomic Ions: • “Poly” – many/multiple/more than one • Polyatomic ions – ions that are made up with more than one atom Examples: NO3-1 SO4-2 MnO4-1 C2H3O2-1 _These are compounds that act just like an individual element

  4. Complex Ionic Compounds Any ionic compound that contains three or more elements. It can ONLY occur if there is a polyatomic ion present in the compound.

  5. This is your list, please do not lose it

  6. Let’s Practice: • Identify the compounds with polyatomic ions: • Hint: Look for 3 or more different atoms in the compound.

  7. Rules for naming Complex Ionic Compounds: • Name the first element directly off the periodic table, IF IT IS A METAL *Remember to identify the charge of any transition metal using roman numerals • Name the second element, IF IT IS A NONMETAL, by changing the ending to -ide • If either of the elements is a polyatomic, name it directly off the polyatomic list, replacing step 1 or 2. Na2CO3 Sodium Carbonate

  8. Naming Complex Ionic Compounds: • Name the first element directly off the periodic table, IF IT IS A METAL *Remember to identify the charge of any transition metal using roman numerals • Name the second element, IF IT IS A NONMETAL, by changing the ending to -ide • If either of the elements is a polyatomic, name it directly off the polyatomic list, replacing step 1 or 2. NH4Cl Ammonium Chloride

  9. Naming Complex Ionic Compounds: When we need multiple polyatomic ions to create a neutral compound, ( ) are used around the polyatomic ion. The subscript is placed OUTSIDE of the ( ) The polyatomic ion MUST be treated as ONE atom….it is a unit that CANNOT be separated. Ca+2 ClO3-1 Ca(ClO3)2 Calcium Chlorate

  10. Let’s Practice:

  11. Rules for writing compound formulas: Write out the ions for each of the elements/polyatomic present Write the charge with each ion present Drop the signs (+/-) Swap the numbers Simplify if necessary Sodium Phosphate Na+1 PO4-3 Na3PO4

  12. Here’s another example: Write out the ions for each of the elements/polyatomic present Write the charge with each ion present Drop the signs (+/-) Swap the numbers Simplify if necessary Aluminum Carbonate Al+3 CO3-2 Al2(CO3)3

  13. Let’s Practice:

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