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Unformatted text preview: # of an uncombined element is 0. 2.  The sum of the oxidaGon #’s of all the atoms in a species is equal to its total charge. The oxidaGon # of H is +1 in combinaGon with nonmetals and ‐1 in combinaGon with metals. The oxidaGon #’s of elements in Groups 1 and 2 is equal to their group number. The oxidaGon # of the halogens is ‐1, unless it is in combinaGon with oxygen or another halogen higher in the group. The oxidaGon number of fluorine is ‐1 in all its compounds. The oxidaGon # of oxygen is ‐2 in most of its compounds. ExcepGons are with fluorine, and as peroxide or superoxide. 3.  4.  5.  6.  Stop video, work in groups, pracGce assigning oxidaGon numbers •  SO2 •  SO42‐ •  P4O6 •  KMnO4 Energy from Electron Transfer What is a REDOX reacGon? before viewing this lecture please complete the POGIL Oxida<on‐Reduc<on ac<vity Unit 6 Week 1 Lecture 2 Oxidizing and Reducing Agents •  Oxidizing Agent – species that causes oxidaGon •  Reducing Agent – species that causes reducGon •  IdenGfy the oxidizing and reducing agents: 2 H2S (g) + SO2 (g) 3 S (s) + 2 H2O (l) •  Mg (s) + Cl2 (g) MgCl2 (s) •  2 NaBr (aq) + Cl2 (g) 2 NaCl (aq) + Br2 (l) •  Fe2O3 (s) + 3 CO (g) 2 Fe (s) + 3 CO2 (g) •  NaCl (aq) + A...
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