Types of reactions video (4 min. animated) Chemical-Reactions.htm Chemical-Reactions.htm Types of reactions with actual video footage HHvx1VC_8&feature=watch-vrec HHvx1VC_8&feature=watch-vrec Types of reactions with balanced equations and “stick figures”

 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 : AgNO 3 (aq)+ NaCl (aq)  AgCl(s) + NaNO 3 (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!

“Getting Together” Girl A + Boy B  Couple AB

A + B  AB Examples: 2 H 2 + O 2  2 H 2 O SO 3 + H 2 O  H 2 SO 4

“Breaking Up” Couple AB  Girl A + Boy B

AB  A + B Examples: 2 KClO 3  2 KCl + 3 O 2 2 H 2 O  2 H 2 + O 2

“Couple/Single Switcheroo” Couple AB + Boy C  Couple AC + Boy B

A + BC  AC + B Examples: Zn + Cu(NO 3 ) 2  Zn(NO 3 ) 2 + Cu

“Couple/Couple Switcheroo” Couple AB + Couple CD  Couple AD + Couple CB

AB + CD  AD + CB Examples: AgNO 3 + NaCl  AgCl + NaNO 3

A combustible material + oxygen → carbon dioxide + water + energy

C 10 H O 2 → 10 CO H 2 O

 Animation Animation  examples examples

CH O 2 → CO H 2 O 3 NO  N 2 O + NO 2 Na 2 CO 3 + Ca(OH) 2  CaCO NaOH 8 H 2 + S 8  8 H 2 S 2 Al 2 O C  4 Al + 3 CO 2 decomposition double displacement synthesis single displacement combustion