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OXIDATION-REDUCTION REACTIONS

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Chapter 10 OXIDATION-REDUCTION REACTIONS oxidation reduction REACTIONS are those involving the transfer of electrons from one substance to another (no bonding formed or broken). Example: Fe 3+ + e- Fe 2+ Protons (H+) are often involved in these REACTIONS also. Another example of redox REACTIONS is: H2O2 + 2e- + 2H+ 2H2O Rules for the assigning of oxidation numbers 1. All species in their elemental form are given the oxidation number of zero. 2. All monoatomic ions have the same oxidation number as the charge on the ion. Mg 2+ has the oxidation number of +2. 3. All combined hydrogen has an oxidation number of +1 (except metal hydrides where its oxidation number is -1). 4. All combined oxygen has an oxidation number of -2 (except peroxides where the oxidation number is -1).

OXIDATION-REDUCTION REACTIONS Oxidation – reduction reactions are those involving the transfer of electrons from one substance to another (no bonding formed or broken). Example: Fe 3+ + e-çŁ Fe 2+ Protons (H+) are often involved in these reactions also. Another example of redox reactions is: H2O2 + 2e-+ 2H+ 2H2O

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