Predicting Products of Chemical Reactions.

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Predicting Products of Chemical Reactions.

• Identify the type of reaction.
• Two elements
• One compound
• One compound,
• One element
• Two compounds
• Hydrocarbon O2

• Synthesis
• Decomposition
• Synthesis or Single replacement
• Synthesis or Double replacement
• Combustion

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Combustion reaction

• The product is always!!!!!!!!! CO2 H2O

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Double Replacement

• Switch the positive ions
• Check Oxidation numbers
• Examples
• HOH KCl ? HCl KOH
• Al2(SO4)3 NH4ClO3 ? (NH4)2SO4 Al(ClO3)2

4
Practice these

• BaCl2 K2O
• MgF2 Li2O
• KI Pb(NO3)2
• FeS HCl

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Single Replacement

• Determine if the single element is positive or
  negative.
• Replace the same charged element in the compound.
• Examples
• Al Pb(NO3)2 ? Al(NO3)3 Pb
• Mg HCl ? MgCl2 H2

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Practice these

• BaCl2 K
• MgF2 O2
• K Pb(NO3)2
• FeS Cl2

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Synthesis

• If there are only two elements
• Combine them into a binary compound.
• Check oxidation number
• Examples
• Rb S ? Rb2S
• Ba S ? BaS

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Practice these

• H2 O2
• Mg Cl2
• K N
• Ca S

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Synthesis

• If there are three or more elements
• THERE WILL BE AT LEAST ONE POLYATOMIC ION.
• ARRANGE THE ELEMENTS INTO A COMMON POLYATOMOC
  ION. THE OTHER ION IS THE ELEMENT LEFT OVER.
• Examples
• H2O SO2 ? H2SO4
• Ca SO2 O2 ? CaSO4

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Practice these

1. NH3 H2O ?
2. H2SO3 O2?
3. CaO SO2 ?
4. MgO PO3 ?

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Decomposition

• Products depends on the compound decomposing
• Binary compounds simply break into individual
  elements
• Examples
• H2O ? H2 O2
• MgCl2 ? Mg Cl2

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Practice these

1. NH3
2. SO2
3. CaO
4. MgO

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Hydroxides

• Metal hydroxide H2O
• Examples
• NaOH ? Na2O H2O
• Ca(OH)2 ? CaO H2O

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Practice these

1. Al(OH)3 ?
2. LiOH?
3. Fe(OH)3?
4. CuOH?

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Carbonates

• Metal oxide CO2
• Examples
• CaCO3 ? CaO CO2
• PbCO3 ? PbO CO2

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Practice these

1. Li2CO3?
2. SrCO3?
3. Cu2CO3?
4. MgCO3?

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Chlorates

• Metal Chloride O2
• Examples
• Ba(ClO3)2 ? BaCl2 O2
• NaClO3 ? NaCl O2
• Fe(ClO3)3 ? FeCl3 O2

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Practice these

1. LiClO3?
2. Sr(ClO3)2?
3. CuClO3?
4. Mg(ClO3)2?