Instructional Objective:

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• Instructional Objective
• 1.Learn different types of reaction

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Five Types of chemical reactions

• Synthesis reaction
• Decomposition reaction
• Single replacement (Single displacement)
• Double replacement (Double displacement)
• Combustion reaction

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To visualize a synthesis reaction look at the
following cartoon

                                                  
  
In the cartoon, the skinny bird (reactant) and
the worm (reactant) combine to make one product,
a fat bird.
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Synthesis reaction

• Also known as composition reaction
• Always going to be one product
• Basic form A    X  ?    AX
• EX. MgO(s)     H2O(l)  ?    Mg(OH)2(s)
• EX. 2P(s)    3Cl2(g)  ?    2PCl3(g)

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To visualize a decomposition reaction look at the
following cartoon

                                                
                            In this cartoon the
egg (the reactant), which contained the turtle at
one time, now has opened and the turtle (product)
and egg shell (product) are now two separate
substances.
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Decomposition reaction

• A single compound breaks down into simpler
  compounds.
• Always going to be one reactant.
• Basic form AX  ?   A    X
• EX. 2H2O(l)  ?    2H2(g)    O2(g)
• EX. 2NaCl(l)  ?    2Na(s)    Cl2(g)

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Notice, the guy in the orange shirt steals the
date of the other guy. So, a part of one of the
reactants trades places and is in a different
place among the products.
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Single replacement

• Always going to an element and a compound.
• Basic form A    BX  ?    AX    B
•  EX. Fe(s)    CuSO4(aq)  ?    FeSO4(aq)  
   Cu(s) (Metal replace the metal)
•  AX    Y  ?    AY X
• EX. Cl2(g)    2NaBr(aq)  ?    2NaCl(aq)  
   Br2(l) (nonmetal replaces the nonmetal only)

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To visualize a double replacement reaction look
at the following cartoon
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Double replacement reaction

• occurrs between ions in aqueous solution .
• occurrs between two compounds.
• Always produce a precipitate (solid) ,a gas or
• water
• Basic form AX    BY  ?    AY    BX
• EX. NaCl (aq)    AgNO3(aq)  ?   NaNO3(aq)  
   AgCl(s)
• EX. HCl(aq)    FeS(s)  ?    FeCl2(aq)    H2S(g)
  
• EX. HCl(aq)    NaOH(aq)  ?    NaCl(aq)  
   H2O(l)

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• Wood as well as many common items that combust
  are organic (i.e., they are made up of carbon,
  hydrogen and oxygen). When organic molecules
  combust the reaction products are carbon dioxide
  and water (as well as heat).

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Combustion reaction

• hydrocarbon is react with oxygen.
• Always produce carbondioxide and water .
• Always produce heat, light or sound
• EX. CH4(g)    2O2(g)  ?    CO2(g)    2H2O(g)
• EX. 2C4H10(g)    13O2(g)  ?    8CO2(g)  
   10H2O(g)