Ch. 16 - Chemical Reactions III. Types of Reactions

A + B  AB 2P + 3Br2  2PBr3 A. Synthesis the combination of 2 or more substances to form a compound only one product forms A + B  AB 2P + 3Br2  2PBr3

AB  A + B 2H2O2  2H2O + O2 B. Decomposition a compound breaks down into 2 or more simpler substances only one reactant AB  A + B 2H2O2  2H2O + O2

A + BC  AC + B Zn + 2HCl  ZnCl2 + H2 C. Single Replacement one element replaces another in a compound metal replaces metal (+) nonmetal replaces nonmetal (-) A + BC  AC + B Zn + 2HCl  ZnCl2 + H2

AB + CD  AD + CB D. Double Replacement 2KOH + CuSO4  K2SO4 + Cu(OH)2 ions in two compounds “change partners” cation(+) of one compound combines with anion(-) of the other AB + CD  AD + CB 2KOH + CuSO4  K2SO4 + Cu(OH)2

CxHy+O2  CO2+H2O CH4 + 2O2  CO2 + 2H2O E. Combustion the burning of a substance in O2 to produce heat hydrocarbons (CxHy) always form CO2 and H2O CxHy+O2  CO2+H2O CH4 + 2O2  CO2 + 2H2O