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Types of Reactions. Four driving forces for chemical reactions. Formation of a solid Formation of water Transfer of electrons Formation of a gas. Main Types of Reactions. Oxidation/Reduction: Synthesis Decomposition Single Replacement Combustion Double Replacement: Precipitation

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Presentation Transcript
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Four driving forces for chemical reactions.
    • Formation of a solid
    • Formation of water
    • Transfer of electrons
    • Formation of a gas
main types of reactions
Main Types of Reactions
  • Oxidation/Reduction:
    • Synthesis
    • Decomposition
    • Single Replacement
    • Combustion
  • Double Replacement:
    • Precipitation
    • Acid-Base
oxidation reduction
Oxidation- Reduction
  • The transfer of electrons
  • To be discussed later…
synthesis
Synthesis
  • Two or more substances combine to form one product

A + X  AX

decomposition
Decomposition
  • One reactant decomposes into two or more products.

AX  A + X

single replacement
Single Replacement

A + BX  AX + B

Y + AX  X + AY

replacement of
Replacement of
  • A metal by a more active metal
  • Hydrogen in water by a metal
  • Hydrogen in acid by a metal
  • Halogens by a more active halogen
double replacement
Double Replacement

AX + BY  AY + BX

The ions of two compounds in water solution exchange ions creating a solid, liquid or a gas.

combustion
Combustion
  • A substance reacts with oxygen releasing heat and light.
    • A + O2 → Various products
    • Commonly: CXHY + O2 → CO2 + H2O
      • Hydrocarbon reacts with oxygen (cumbustion/decomposition)
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