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Polyatomic Ions

Polyatomic Ions. December 3, 2012. Do Now. Objective. Write the formula for Aluminum Iodide Name the ionic compound AlBr 3. Chem10 IC42 – Ionic Compounds

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Polyatomic Ions

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  1. Polyatomic Ions December 3, 2012

  2. Do Now Objective • Write the formula for Aluminum Iodide • Name the ionic compound AlBr3 Chem10 IC42 – Ionic Compounds I can recognize the electron structure of ionic bonds and ionic compounds, as well as define polyatomic ions, ionic bonds and ionic compounds. I can draw the Lewis Structure of ionic compounds. I can name ionic compounds using standard IUPAC nomenclature. Puedoreconocer la estructuraelectrónica de los enlaces iónicos y compuestosiónicos, asícomodefinir los ionespoliatómicos, enlaces iónicos y compuestosiónicos. Puedodibujar la estructura de Lewis de compuestosiónicos. Puedonombrarcompuestosiónicosusando el estándarnomenclatura de la IUPAC.

  3. Polyatomic Ions • Polyatomic Ion: an ion consisting of two or more atoms linked by covalent bonds. • Examples: • NH41+ • NO31- • SiF62-

  4. Common Polyatomic Ions

  5. Kriss-Kross with Polyatomic Ions • Polyatomic ions can be balanced with the krisskross method just like regular ionic compounds! • Write the cation (+) first and the anion (-) second. • Krisskross the ion charges • If there is more than one polyatomic ion write parentheses () around it before you krisskross

  6. Kriss-Kross with Polyatomic Ions • Example: Aluminum and chromate • Write the cation (+) first and the anion (-) second. Al3+ CrO42- • Krisskross the ion charges • If there is more than one polyatomic ion write parentheses () around it before you krisskross

  7. Kriss-Kross with Polyatomic Ions • Example: Aluminum and dichromate • Write the cation (+) first and the anion (-) second. Al3+ CrO42- • Krisskross the ion charges Al2CrO4 3 • If there is more than one polyatomic ion write parentheses () around it before you krisskross

  8. Kriss-Kross with Polyatomic Ions • Example: Aluminum and chromate • Write the cation (+) first and the anion (-) second. Al3+ CrO42- • Krisskross the ion charges Al2CrO4 3 • If there is more than one polyatomic ion write parentheses () around it before you krisskross Al2(CrO4)3 aluminum chromate

  9. KrissKross with Polyatomic Ions • Example 2: Ammonium and Chlorine • NH41+ Cl1- • NH41Cl 1 • NH4Cl  ammonium chloride

  10. KrissKross with Polyatomic Ions • Guided Practice: Magnesium Carbonate • Write the cation (+) first and the anion (-) second. • Krisskross the ion charges • If there is more than one polyatomic ion write parentheses () around it before you krisskross

  11. KrissKross with Polyatomic Ions • Guided Practice: Hydronium Sulfate • Write the cation (+) first and the anion (-) second. • Krisskross the ion charges • If there is more than one polyatomic ion write parentheses () around it before you krisskross

  12. Kriss-Kross with Polyatomic Ions • Use the kriss-krossmethod to write the balanced ionic compounds with the following ions. • Sodium and Nitrate: • Lithium and Cyanide: • Magnesium and Chromate: • Ammonium and Oxygen • Calcium and Nitrite:   • Potassium and Thiosulfate

  13. Kriss-Kross with Polyatomic Ions • Use the kriss-krossmethod to write the balanced ionic compounds with the following ions. • Sodium and Nitrate: NaNO3 • Lithium and Cyanide: LiCN • Magnesium and Chromate: MgCrO4 • Ammonium and Oxygen: (NH4)2O • Calcium and Nitrite: Ca(NO2)2 • Potassium and Thiosulfate: K2S2O3

  14. KrissKross with Polyatomic Ions • Practice on your own with the HW:

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