Wednesday 4407 Bday

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Wednesday 4/4/07B-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)
• A B AB
• 2Mg O2 2MgO
• Opposite of decomposition
• SrO H2O Sr(OH)2
• Decomposition
• AB A B
• Specific products given a specifc reactantyou
  must memorize the reactions.

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Decomposition Rxns

• metallic carbonate metallic oxide carbon
  dioxide
• Na2CO3(s) Na2O(s) CO2(g)
• BaCO3(s) BaO(s) CO2(g)
• Al2(CO3)3(s)
• Predict the names
• Aluminum oxide
• carbon dioxide
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• Al2(CO3)3(s) Al2O3(s) 3CO2(g)

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Decomposition Rxns

• metallic chlorate metallic chloride oxygen
• 2KClO3(s) 2KCl(s) 3O2(g)
• 2Ba(ClO3)2(s) 2BaCl2(s) 3O2(g)
• Ca(ClO3)2(s)
• Predict the names
• Calcium chloride
• oxygen
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• Ca(ClO3)2(s) CaCl2(s) 3O2(g)

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Decomposition Rxns

• metallic hydroxide metallic oxide water
• Mg(OH)2(s) MgO(s) 3H2O(g)
• 2NaOH(s) Na2O(s) H2O(g)
• Al(OH)3(s)
• Predict the names
• Aluminum oxide
• water
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• 2Al(OH)3(s) Al2O3(s) 3H2O(g)

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Decomposition Rxns

• oxyacid nonmetallic oxide water
• H2CO3(aq) CO2(g) H2O(l)
• H2SO4(aq) SO3(g) H2O(l)
• H3PO4(aq)
• Predict the names
• Diphosphorus pentoxide or phosphorus(V) oxide
• water
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• 2H3PO4(aq) P2O5(g) 3H2O(l)

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Decomposition Rxns

• Binary compound constituent elements
• 2NaCl(s) Cl2(g) 2Na(l)
• 2H2O(l) 2H2(g) O2(g)
• CaF2(s)
• Predict the names
• calcium
• fluorine
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• CaF2(s) Ca(l) F2(g)

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Single Replacement Rxns

• A BC AC B
• 2Na(s) 2H2O(l) H2(g) 2NaOH(aq)
• Zn(s) 2HCl(aq) ZnCl2(aq) H2(g)
• Fe(s) PbSO4(aq)
• Predict the names
• Iron(II) sulfate
• lead
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• Fe(s) PbSO4(aq) FeSO4(aq) Pb(s)

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Single Replacement Rxns

• A BC BA C
• Cl2(g) 2KBr(aq) 2KCl(aq) Br2(l)
• F2(g) NaCl(aq)
• Predict the names
• Sodium fluoride
• chlorine
• Write the formulas
• Cross the charges
• Drop the sign
• reduce
• Balance
• List elements
• Count atoms
• Insert coefficients
• F2(g) 2NaCl(aq) 2NaF(aq) Cl2(g)