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Classifying Chemical Reactions

Classifying Chemical Reactions.  It may seem like there are many different ways that chemicals can react!. In fact, chemists have determined that are FOUR main ways that chemicals interact. Four main types of reactions:. Synthesis Decomposition Single Displacement Double Displacement.

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Classifying Chemical Reactions

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  1. Classifying Chemical Reactions

  2.  It may seem like there are many different ways that chemicals can react! • In fact, chemists have determined that are FOUR main ways that chemicals interact

  3. Four main types of reactions: • Synthesis • Decomposition • Single Displacement • Double Displacement We will also learn about Combustion of a Hydrocarbon

  4. Synthesis Reactions: • A + B  AB • Two elements combine to form a compound • or • two small compounds form a larger compound • Example: • 2Mg + O2 2MgO

  5. Decomposition Reactions: • AB  A + B A larger compound breaks down into two elements or two smaller compounds. • Example: • 2H2O  2H2 + O2

  6. Try These!! Classify each of the following reactions as synthesis or decomposition reactions. Synthesis 1)2H2 + O2 2H2O____________________ Decomposition 2) Na2CO3 Na2O +CO2_____________________ 3) Hydrogen Peroxide  Water + Oxygen Gas__________________ Decomposition 4) Sodium + Chlorine gas  Sodium Chloride__________________ Synthesis

  7. Single Displacement Reactions: • A + BC  AC + B An element takes the place of another element in a compound. Zinc has “kicked out” the hydrogen! • Example: • Zn + 2HCl  ZnCl2 + H2

  8. Another way to think of this!... One partner in a dancing couple gets “bumped out” by a stronger dancer! Penguin “bumps out” mouse to dance with monkey!

  9. Double Displacement Reactions: • AB + CD  CB + AD Elements in different compounds switch places. Sodium and silver have switched places! • Example: • NaCl + AgNO3  AgCl +NaNO3

  10. Two dancing couples switch partners! + + Switch places

  11. YouTube Video • Five Major Chemical Reactions

  12. Try these!!: Classify each of the following reactions as single or double displacement reactions. 1) Zn + AgNO3Zn(NO3)2 + Ag _____________________ Single displacement 2) CuNO3 + KClKNO3 + CuCl ______________________ Double displacement 3) 2KCl + Pb(NO3)22KNO3 + PbCl2 ______________________ Double displacement 4) Al + Fe(NO3)3  Al(NO3)3 + Fe ______________________ Single displacement

  13. Combustion of a Hydrocarbon Fuel • Combustion: • when a fuel reacts with oxygen releasing heat • Clean combustion produces: • CARBON DIOXIDE and WATER • Example: • CH4 + O2 CO2+ 2H2O • (methane)

  14. Assignment: • 1) Types of Chemical Reactions Chart • 2) Worksheet: Types of Chemical Reactions

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