Types of Reactions

Types of reactions video (4 min. animated) http://video.about.com/chemistry/What-Are-Types-of-Chemical-Reactions.htm

Types of reactions with actual video footage http://www.youtube.com/watch?v=i-HHvx1VC_8&feature=watch-vrec  Types of reactions with balanced equations and “stick figures” http://www.youtube.com/watch?v=3qQvDDL3zTk

Chemical Reactions A chemical reaction changes the properties and energy of the old

substances into a new substance.  A chemical reaction involves a rearrangement of atoms.

Chemical Equations: Show Changes that take place in a chemical reaction.

  EXAMPLE: AgNO3 (aq)+ NaCl (aq) AgCl(s) + NaNO3(aq)

Reactants Yield Products  Reactants: The chemicals you start with Products: The chemicals you end up with  Conservation of Mass: You must have the same amount of each

element at the beginning and the end of a reaction. Elements cannot appear or disappear!

Not ALL equations fit nicely into one of these

categories!

NOTE:

Synthesis reaction:

“Getting Together”

Girl A + Boy B Couple AB

Synthesis reaction:

A + B AB

Examples:2 H2 + O2 2 H2O

SO3 + H2O H2SO4

Decomposition reaction:

“Breaking Up”

Couple AB Girl A + Boy B

Decomposition reaction:

AB A + B

Examples:2 KClO3 2 KCl + 3 O2

2 H2O 2 H2 + O2

Single displacement reaction:

“Couple/Single Switcheroo”

Couple AB + Boy C Couple AC + Boy B

Single displacement reaction:

A + BC AC + B

Examples:Zn + Cu(NO3)2 Zn(NO3)2 + Cu

Double displacement reaction:

“Couple/Couple Switcheroo”

Couple AB + Couple CD Couple AD + Couple CB

Double displacement reaction:

AB + CD AD + CB

Examples:AgNO3 + NaCl AgCl + NaNO3

Combustion

A combustible material + oxygen → carbon dioxide + water +

energy

Examples

C10H8 + 12 O2 → 10 CO2 + 4 H2O

Types of Equations - summary

Animation examples

identify the types of reactions

CH4 + 2 O2 → CO2 + 2 H2O

3 NO N2O + NO2

Na2CO3 + Ca(OH)2 CaCO3 + 2 NaOH

8 H2 + S8 8 H2S

2 Al2O3 + 3 C 4 Al + 3 CO2

decomposition

double displacement

synthesis

single displacement

combustion