Chemical Rxns-Limiting Reagents

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Chemical Rxns-Limiting Reagents Types of Rxns

• Today you will learn
• How much a rxn produces
• The 5 types of reactions

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Imagine(dont write this!)

• If you bought a kit to build a car, what happens
  if you dont have enough bolts and screws?
• If you build a bookcase out of wood, what do you
  do with the extra pieces?

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I. How much does a reaction produce?

• A. During a chemical reaction, the completeness
  of the reaction is dependant on the amount of the
  reactants and the product lost in the process.

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Chemical Reactions

• Many times, there is an excess amount of one of
  the reactants and the other reactant is
  completely used up.

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Chemical Reactions (cont)

• The limiting reagent is the substance that is
  used up first.

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II. Types of Chemical Reactions

• Combustion- where an organic compound (CxHyOz)
  react with O2 to form oxide compounds.
• C2H5OH O2 ? CO2 H2O Energy
• 1. Highly exothermic light, sound, heat is
  produced.

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Types of Reactions

• Synthesis-Simple substances form into complex
  substances.
• CO2 H2O ? C6H12O6 O2
• simple complex

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Types of Reactions

• C. Decomposition-A compound is broken down into
  simpler substances.
• CH3OH ? CO H2
• complex simple

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Types of Reactions

• D. Single Displacement- One atom leaves a
  compound to join with another atom to form a
  compound.
• K HCl ? KCl H2

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Types of Reactions

• Double Replacement-Both compounds break apart to
  become two new compounds.
• KCl Na(OH) ? NaCl K(OH)