Balancing redox equations

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Intros
Lessons
  1. Balancing redox equations
  2. Two methods to balance redox.
  3. Balancing redox using half-equations.
  4. Balancing redox using oxidation number.
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Examples
Lessons
  1. Balance and complete the following redox equations using either oxidation numbers or half-equations. All are in acidic conditions.
    1. Sn2+ + IO3-\enspace \enspace Sn4+ + I-
    2. Cr3+ + BiO3-\enspace \enspace Bi2+ + Cr2O72-
    3. MnO4- + SO2 \enspace \enspace Mn2+ + HSO4-