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   1# Redox reactions
   2
   3Reduction - oxidation
   4Simultaneous process
   5
   6
   7## Magnesium oxidation
   82Mg(s) + O2g(g) -> 2MgO (net reaction)
   9
  10
  11Mg(s) -> Mg^2+(s) + 2e- (half equation)  
  12O2(g) +4e- -> 2O2-(s) (half equation)
  13
  14Solving simultaneous redox equations
  15
  162mg(s) -> 2Mg2+(s) + 4e-  
  172mg(s) + O2(g) -> 2Mg(2+)(s) + 2O(2-)(s)  
  18-> 2MgO(s)