Molecular, Ionic and Net Ionic Equations

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Molecular, Ionic and Net IonicEquations
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• Sodium chloride and silver nitrate
• ? sodium nitrate and silver chloride
• NaCl AgNO3 ? NaNO3 AgCl(s)
• The AgCl is labeled with (s) because it is
  insoluble and forms a precipitate.

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Ionic Equation

• Na Cl- Ag NO3-
• ? Na NO3- AgCl(s)
• All substance are dissociated except for the
  insoluble AgCl(s)

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Net Ionic Equation

• The ions not involved in forming the precipitate
  (Na and NO3-) are called "Spectator Ions" and
  are eliminated to form the net ionic equation.
• Ag Cl- ? AgCl(s)
• Any source of silver ions and chloride ions would
  result in the same net ionic equation. Sodium
  chloride substitutes contain potassium chloride.

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• 2. Copper(II) chloride sodium sulfide
• ? copper(II)sulfide and sodium
  chloride
• CuCl2 Na2S ? CuS NaCl
• CuCl2 Na2S ? CuS(s) 2NaCl
• Cu2 2Cl- 2Na S2-
• ? CuS(s) 2Na 2Cl-
• The spectator ions are Na and Cl-
• Cu2 S2- ? CuS(s)

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• 3. Calcium chloride sodium carbonate
• calcium carbonate and sodium chloride
• CaCl2 Na2CO3 ? CaCO3(s) 2NaCl
• Ca2 2Cl- 2Na CO32-
• ? CaCO3(s) 2Na 2Cl-
• The spectator ions are Na and Cl-
• Ca2 CO32- ? CaCO3(s)

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• 4. Barium nitrate sodium phosphate
• ? barium phosphate and sodium nitrate
• Ba(NO3)2 Na3PO4 ? Ba3(PO4)2(s) NaNO3
• 3Ba(NO3)2 2Na3PO4 ? Ba3(PO4)2(s) 6NaNO3
• 3Ba2 6NO3- 6Na 2PO43-
• ? Ba3(PO4)2(s) 6Na 6NO3-
• The spectator ions are Na and NO3-
• 3Ba2 2PO43- ? Ba3(PO4)2(s)

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• 5. Chromium(III) chloride silver nitrate
• ? chromium(III) nitrate and silver chloride
• CrCl3 3AgNO3 ? Cr(NO3)3 3AgCl(s)
• Cr3 3Cl- 3Ag 3NO3-
• ? Cr3 3NO3- 3AgCl(s)
• 3Ag 3Cl- ? 3AgCl(s)
• Ag Cl- ? AgCl(s)