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Classification of Chemical Reactions
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Classification of Chemical Reactions

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Microsoft Power Point presentation used to teach the five types of chemical reactions to Chemistry I Honors

Microsoft Power Point presentation used to teach the five types of chemical reactions to Chemistry I Honors

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Classification of Chemical Reactions Classification of Chemical Reactions Presentation Transcript

  • What’s in a name?
    The FIVE General Types of Chemical Reactions
  • Definition: A reaction in which TWO or more substances combine to form a SINGLEnew compound.
    Characteristics:
    General Formula: A + X -> AX
    Synthesis Reaction
  • Example of Synthesis Reaction
    Formula Equation: A chemical equation written in proper chemical formulas ONLY.
    Na + Cl2 -> NaCl
    Notice how the product, NaCl: is chemically different from both the reactants, Sodium - METAL, and Chlorine – GREEN GAS.
  • Additional Example of Synthesis Reactions
    Example #2:
    Fe + O 2 -> Fe3O2
    This is the chemical process we call, RUST.
  • H2O -> H2 +O2
    This reaction only takes place during electrolysis; when an electrical current is used.
    Non-Example of Synthesis Reaction
    ** The Electrolysis of Water - Movie
  • Definition: A reaction in which ONE substance breaks down to form TWO or more simpler substances.
    Characteristics:
    General Formula: AX -> A + X
    Usually occurs in the presence of heat or electricity.
    Decomposition Reaction
  • Example of Decomposition Reaction
    Example:
    CuCO3 -> CuO + CO2
    NOTE: We can easily tell the difference chemically between CuCO3 and CuO because of the CHANGE IN COLOR.
  • Additional Example of Decomposition Reactions
    Formula Equation:
    I4O9-> I2O6 + I2
  • Example #1:
    Al + Pb(NO3)2-> Pb + Al(NO3)3
    NOTE: The colors help you keep track of where the element is written in the equation.
    Non-Example of Decomposition Reaction
  • Definition: A reaction in which ONE element takes the place of another element in a compound.
    Characteristics:
    General Formula: A + BX -> AX + B
    Single-Replacement Reaction
  • Example of Single-Replacement Reaction
    • Example #1:
    Al + Pb(NO3)2-> Pb + Al(NO3)3
  • Additional Example of Single-Replacement Reactions
    Cu + AgNO3 -> CuNO3 + Ag
    ** Copper and Silver Nitrate Reaction - Clip
  • Non-Example of Single-Replacement Reaction
    Pb(NO3)2+ KI -> PbI2+ KNO3
  • Definition: A reaction in which appears exchange of atoms or ions between two compounds has occurred.
    Characteristics:
    General Formula: AY + BX -> AX + BY
    Double-Replacement Reaction
  • Example of Double -Replacement Reaction
    Pb(NO3)2+ KI -> PbI2+ KNO3
  • Additional Example of Double-Replacement Reactions
    Formula Equation:
    NaCl+ AgF-> NaF+ AgCl
  • Formula Equation:
    Non-Example of Double-Replacement Reaction
    1) CuCO3 -> CuO + CO2
    2) Na + Cl2 -> NaCl
  • Definition: A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide.*
    Characteristics:
    A common combustion reactant is oxygen.
    Two common combustion products are carbon dioxide and water.
    Combustion Reaction
  • Additional Examples of Combustion Reaction
    Example #1:
    CH4 + O2 -> CO2+ H2O
    Example #2:
    C3H8+ O2 -> CO2 + H2O
  • Non-Example of Combustion Reaction
    1) CuCO3 -> CuO+ CO2
    2) Na + Cl -> NaCl
    3) NaCl+ AgF-> NaF+ AgCl
  • In-Class Assignment
    Complete Questions 1-10 on Worksheet: Classification of Chemical Reactions
    Sample Problem - Q10
    Ca(OH)2 + H2SO4-> CaSO4 + H2O