Reaction Types

Combustion Oxygen reacts and produces CO 2 and H 2 O General Reaction: C x H x + O 2  CO 2 + H 2 O

Synthesis, Combination Two or more simple compounds combine to form a more complicated one. A + B  AB

Decomposition A complex molecule breaks down to make simpler ones (opposite of synthesis). AB  A + B

Single Displacement One element trades places with another element in a compound. A + BC  AC + B

Double Displacement The anions and cations of two different molecules switch places, forming two entirely different compounds. AB + CD  AD + CB

Fe is oxidized Cu is reduced Redox Reaction OiL RiG Oxidation Is Losing electrons Reduction Is Gaining Electrons Fe + Cu 2+  Fe 2+ + Cu

Acid-Base React to form “Salt” and Water Example: HBr + KOH  H 2 O + KBr

Balancing Reactions Law of Conservation of Mass - Same number of atoms on each Use coefficients (numbers in front) to balance the equations. ___Al + ___FeCl 2 → ___AlCl 3 +___Fe 1 Al Al 1 1 Fe Fe 1 2 Cl Cl 3