Tuesday 41007 Aday

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Tuesday 4/10/07A-day

• Chemical Equations (Ch 11)

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Paper work

• Stuff to collect

• Stuff to distribute

• nothing

• nothing

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Objectives for CH 11

• Write a word equation and a formula equation for
  a given chemical reaction.
• Balance a formula equation by inspection.
• Classify a reaction as a synthesis,
  decomposition, single-displacement,
  double-displacement, or combustion reaction.
• Predict the products for chemical reactions.
• Use an activity series to predict whether a given
  reaction will occur and what the products will be.

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Predicting Products

• Synthesis (a.k.a. Composition)
• SrO H2O
• SrO H2O Sr(OH)2
• Decomposition
• K2CO3(s)
• K2CO3(s) K2O(s) CO2(g)
• Sr(ClO3)2(s)
• Sr(ClO3)2(s) SrCl2(s) 3O2(g)
• Mg(OH)2(s)
• Mg(OH)2(s) MgO(s) H2O(g)
• Single Replacement
• Zn(s) 2HCl(aq)
• Zn(s) 2HCl(aq) ZnCl2(aq) H2(g)

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Double Replacement Rxns

• AB CD CB AD
• AgNO3(aq) NaCl(aq) NaNO3(aq) AgCl(s)
• What forms a ppt? Solubility Chart
• Na2CO3(aq) Ba(NO3)2(aq)
• Predict the names
• Barium carbonate
• Sodium nitrate
• Check Solubility Chart
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• Na2CO3(aq) Ba(NO3)2(aq) 2NaNO3(aq) BaCO3(s)

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Net Ionic Equations

• Complete Ionic Equation (all ions)
• Na(aq) NO3-(aq) Ba2(aq) CO32(aq)
  Na(aq) NO3-(aq) BaCO3(s)
• Net Ionic Equation (eliminate spectator ions)
• Na(aq) NO3-(aq) Ba2(aq) CO32-(aq)
  Na(aq) NO3-(aq) BaCO3(s)
• Spectator ions dont do anything in the reaction,
  thus they are the same on the reactant side and
  product side.
• Balance the Net Ionic Equation for charge and
  number of atoms
• Ba2(aq) CO32-(aq) BaCO3(s)

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More Double Replacement Rxns

• Formation of a gas
• Acid Metallic Carbonate CO2(g) H2O(g)
  salt(aq)
• H2SO4(aq) Na2CO3(s) CO2(g) H2O(g)
  Na2SO4(aq)
• Acid Metallic sulfite SO2(g) H2O(g)
  salt(aq)
• 2HCl(aq) K2SO3(s) SO2(g) H2O(g) 2KCl(aq)
• Acid Metallic sulfide H2S(g) salt(aq)
• 2HCl(aq) FeS(s) H2S(g) FeCl2(aq)

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Combustion Rxns

• Hydrocarbon O2(g) CO2(g) H2O(g)
• C3H8(g) O2(g) CO2(g) H2O(g)
• C5H12(g) O2(g) CO2(g) H2O(g)
• C8H18(g) O2(g) CO2(g) H2O(g)
• C4H10(g) O2(g)

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Homework for Tomorrow

• Finish all of the Section Reviews from chapter 11
  (11.1, 11.2, 11.3)
• Print out a copy of the Activity Series from my
  website (assignments pagerubrics stuff)