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Podcast 7.5 Molecular, Complete Ionic, and Net Ionic Equations

Podcast 7.5 Molecular, Complete Ionic, and Net Ionic Equations. Forming Ions. Ionic (i.e. ________) refers to positive ion and negative ion Usually this is a metal + non-metal or metal + polyatomic ion Examples: NaCl , NaClO 3 , Li 2 CO 3

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Podcast 7.5 Molecular, Complete Ionic, and Net Ionic Equations

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  1. Podcast 7.5Molecular, Complete Ionic, and Net Ionic Equations

  2. Forming Ions • Ionic (i.e. ________) refers to positive ion and negative ion • Usually this is a metal + non-metal or metal + polyatomic ion • Examples: NaCl, NaClO3, Li2CO3 • Polyatomic ions are listed on your naming card

  3. What it Means to be “Dissolved,” (aq) • (aq) means ___________ (dissolved in water) • For salts (aq) means the salt exists as _____ • NaCl(aq) is the same as: Na+(aq) + Cl–(aq) • Acids form ions: HCl(aq) is H+(aq) + Cl–(aq), Bases form ions: NaOH(aq) is Na+ + OH– http://www.northland.cc.mn.us/biology/biology1111/animations/dissolve.html

  4. The Solubility Rules Na-Cl-NO-SO-OH

  5. Circle all the ionic compounds that are INSOLUBLE (these are the precipitates)

  6. Practice with writing ions Q - Write ions for Na2CO3(aq) A - 2Na+(aq) + CO32–(aq) Notice that when ions form from molecules, charge can be separated, but the total charge (and number of each atom) stays constant.

  7. Practice Writing Ions Example 1 Write ions for Ca3(PO4)2(aq) & Cd(NO3)2(aq)

  8. Practice Writing Ions Example 2 Write ions for Na2S(aq) and Mg3(BO3)2(aq)

  9. Types of chemical equations Equations can be divided into 3 types 1) Molecular, 2) Complete Ionic, 3) Net ionic • Here is a typical molecular equation: Cd(NO3)2(aq) + Na2S(aq)  CdS(s) + 2NaNO3(aq)

  10. Complete Ionic Equation Cd(NO3)2(aq) + Na2S(aq)  CdS(s) + 2NaNO3(aq) • We can write this as complete ionic equation – all compounds that are (aq) are written as ions

  11. Net Ionic Equation • To get the NET ionic equation we cancel out all terms that appear on both sides: Cd2+(aq) + 2NO3–(aq) + 2Na+(aq) + S2–(aq)  CdS(s) + 2Na+(aq) + 2NO3–(aq)

  12. Equations must be balanced Materials balance Both sides of an equation should have the same number of each type of atom Electrical balance Both sides of a reaction should have the same net charge

  13. Example 3 When NaOH(aq) and MgCl2(aq) are mixed, _______(s) and NaCl(aq) are produced. Write balanced molecular, ionic & net ionic equations

  14. Example 4Write the balanced net ionic equation CuSO4(aq) + BaCl2(aq)  CuCl2(aq) + BaSO4(s)

  15. Example 5 Write the balanced net ionic equation Fe(NO3)3(aq) + LiOH(aq) _____(aq) + Fe(OH)3(s)

  16. Example 6Write the balanced net ionic equation Na3PO4( ) + CaCl2( )  _____( ) + NaCl( )

  17. Example 7Write the balanced net ionic equation Na2S( ) + AgC2H3O2( )  ____( ) + Ag2S( )

  18. Use the solubility rules to predict the products and write the net ionic equation for the following reactions. Al (s) + H2SO4 (aq) →

  19. Use the solubility rules to predict the products and write the net ionic equation for the following reactions. HCl (aq) + Ba(OH)2 (aq) →

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