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Aqueous Solutions and Reactions: Complete Ionic and Net Ionic Equations

Learn about reactions in aqueous solutions, complete ionic equations, and net ionic equations. Practice examples in forming precipitates, water, and gases.

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Aqueous Solutions and Reactions: Complete Ionic and Net Ionic Equations

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  1. Section 3: Reactions in Aqueous Solutions • Terms to know: • Aqueous Solutions: substances disolved in water • solutes: substance dissolved in water • solvent: what the substance is • dissolved in (ie. water)

  2. Complete Ionic Equation • Shows all particle in a solution • Here’s the equation • + • --> • + • 2NaCl(aq) • Cu(OH)2(s) • Cu(OH)2(s) • 2NaOH(aq) • 2Na+(aq) • CuCl2(aq) • Cu2+ • 2Cl-(aq) • 2OH-(aq) • 2Na(aq) • 2Cl(aq) • Now Separate ALL the ions in aqueous solution • + • + • + • --> • + • +

  3. + • + • + • --> • 2Na+(aq) • 2OH-(aq) Spectator Ions • Cu2+ • 2Cl-(aq) • Ions that do not participate in a reaction • + • + • 2Na(aq) • 2Cl(aq) • Cu(OH)2(s) • Here’s the complete Ionic Equation • Now Cancel out all the ions that are NOT part of the reactions (ions that do not produce the solid)

  4. + • + • + • + • 2Na+(aq) • 2Cl-(aq) Net Ionic Equation • 2Na(aq) • 2Cl(aq) • Includes only the particles that participate in a reaction • Here’s the net ionic equation with spectator ions cancelled • + • --> • 2OH-(aq) • Cu2+ • Cu(OH)2(s) • Remove the Spectator ions

  5. 3 Types of Aqueous Reactions • 1. Reactions that form Precipitates (solids) • 2NaOH(aq) + CuCl2(aq) --> 2NaCl(aq) + Cu(OH)2(s). • 2. Reactions that form Water • HBr(aq) + NaOH(aq) --> H2O(l) + NaBr(aq) • 3. Reactions that form Gases • 2HI(aq) + Li2S(aq) --> H2S(g) + 2LiI(aq)

  6. Practice • 1. Reactions that form Precipitates (solids) • 2NaOH(aq) + CuCl2(aq) --> 2NaCl(aq) + Cu(OH)2(s).

  7. Practice • 2. Reactions that form Water • Br-(aq) • HBr(aq) + NaOH(aq) --> H2O(l) + NaBr(aq) • H+(aq) • Na+(aq) • OH(aq) • H2O(l) • Na+(aq) • Br-(aq) • + • + • + • OH(aq) • --> • H+(aq) • + • + • H2O(l) • Write the complete Ionic equation • Cancel the spectator ions • Write the net ionic equation • + • -->

  8. 3. Reactions that form Gases Practice • 2H(aq) • 2HI(aq) + Li2S(aq) --> H2S(g) + 2LiI(aq) • 2Li(aq) • S(aq) • H2S(g) • 2I(aq) • 2Li(aq) • 2I(aq) • 2H(aq) • + • + • + • S(aq) • --> • H2S(g) • + • + • Write the complete Ionic equation • Cancel the spectator ions • Write the net ionic equation • + • -->

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