Types of Chemical Reactions Notes

Synthesis Reaction 2 elements or compounds combine to make one compound. A + B ® AB Na + Cl2 ® NaCl Ca +O2 ® CaO

Decomposition Reactions decompose = fall apart one compound (reactant) falls apart into two or more elements or compounds. AB  A + B NaCl  Na + Cl2

Single Replacement or Displacement One element replaces another Reactants must be an element and a compound. Products will be a different element and a different compound. A + BC ® AC + B Na + SrCl2 ® Sr + NaCl

Double Replacement Two compounds replace each other. AB + CD  AD + CB ZnS + HCl  ZnCl + H2S

Combustion CH4 + O2  CO2 + H2O A hydrocarbon reacts with oxygen to produce carbon dioxide and water CH4 + O2  CO2 + H2O

We do (name the type of reaction) HgO  Hg + O2 Cl2 + NaBr  NaCl + Br2 C3H8 + O2  CO2 + H2O  CuCl2 + H2S  CuS + HCl P + O2  P4O10