Ch' 16 Chemical Reactions

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Ch. 16 - Chemical Reactions

• III. Types of Reactions

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A. Synthesis

• the combination of 2 or more substances to form a
  compound
• only one product forms

A B ? AB
2P 3Br2 ? 2PBr3
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B. Decomposition

• a compound breaks down into 2 or more simpler
  substances
• only one reactant

AB ? A B
2H2O2 ? 2H2O O2
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C. Single Replacement

• one element replaces another in a compound
• metal replaces metal ()
• nonmetal replaces nonmetal (-)

A BC ? AC B
Zn 2HCl ? ZnCl2 H2
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D. Double Replacement

• ions in two compounds change partners
• cation() of one compound combines with anion(-)
  of the other

AB CD ? AD CB
2KOH CuSO4 ? K2SO4 Cu(OH)2
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E. Combustion

• the burning of a substance in O2 to produce heat
• hydrocarbons (CxHy) always form CO2 and H2O

CxHyO2 ? CO2H2O
CH4 2O2 ? CO2 2H2O