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What is the importance of expressing a net ionic equation?

What is the importance of expressing a net ionic equation?. What is a NET IONIC EQN?.

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What is the importance of expressing a net ionic equation?

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  1. What is the importance of expressing a net ionic equation?

  2. What is a NET IONIC EQN? • The dictionary definition is:Chemical equation for a reaction which lists only those species participating in the reaction.MY definition is:An equation that shows only the reactants involved in the formation of a precipitate.

  3. Key Terminology • Net Ionic Equations : include ions that dissociate an aqueous solution, only those involved in the formation of a precipitate • Precipitate = solid product that does not break apart • Spectator Ion = ion that does not take part in the reaction

  4. Watch This! • http://www.crescent.edu.sg/crezlab/webpages/PptReaction_AgCl.htm Ppt  Ppt

  5. Let’s Look at an Example! +1 +1 -1 -1 -1 AgNO3(aq) + KCl(aq) AgCl(s) + KNO3(aq) • Assign Charges to all species. +1 +1 -1

  6. +1 -1 +1 -1 +1 -1 +1 -1 AgNO3(aq) + KCl(aq) AgCl(s) + KNO3(aq) Ag +1 NO3-1 +K+1 Cl-1  AgCl (s) + K+1 NO3-1 • Assign Charges to all species. • Dissociate all (aq) species – SLOSHERS! • SOLIDS STAY (s) – do not dissociate.

  7. AgNO3(aq) + KCl(aq) AgCl(s) + KNO3(aq) Ag +1 +NO3-1 +K+1 + Cl-1  AgCl (s) + K+1 + NO3-1 • Assign Charges to all species. • Dissociate all (aq) species – SLOSHERS! • SOLIDS STAY (s) – do not dissociate. • Cross out spectators. Cross out spectators because they do not take place in the reaction. They are still floating around in the solution.

  8. AgNO3(aq) + KCl(aq) AgCl(s) + KNO3(aq) Ag +1 +NO3-1 +K+1 + Cl-1  AgCl (s) + K+1 + NO3-1 Ag +1 + Cl-1  AgCl (s) • Assign Charges to all species. • Dissociate all (aq) species – SLOSHERS! • SOLIDS STAY (s) – do not dissociate. • Cross out spectators. • Rewrite remaining. • Balance.

  9. Try one! Pb(NO3)2(aq) + AlCl3(aq)  Cu(SO4) (aq) + Cal2(aq) 

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