II. Types of Reactions.

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Presentation transcript:

II. Types of Reactions

A. Synthesis (Combination) Reaction When two or more simple compounds/atoms combine to form 1 complex compounds A + B  AB Ex: 8Fe + S8  8FeS

B. Decomposition Reaction Opposite of synthesis 1 complex compound becomes two or more simple compounds/atoms AB  A + B Ex: H2O2  H2 + O2

C. Combustion Reaction Hydrocarbon reacts with oxygen to produce carbon dioxide and water Exothermic reaction (heat is released) Example: CH4 + 2O2  CO2 + 2H2O

D. Single Replacement (Steal Yo Girl) Reaction One atom replaces another atom in a compound. A + BC  AC + B Example: 2Al + 6HCl  2AlCl3 + 3H2

E. Double Replacement (Dance Partners) Reaction Cations and anions of two compounds switch places AB + CD  AD + CB Ex: Pb(NO3)2 + 2KI  PbI2 + 2KNO3