How to Balance Redox Equations
Sulphuric Acid is reduced by Iodide ions to form Sulphur Dioxide and Iodine. Reduction Half Equation H2SO4 ----------> SO2 1. Balance the species that have been oxidised or reduced. In this case the sulphur has been reduced from +6 to +4. The sulphur atoms are balance. 2. Balance the oxygen atoms using water There are 4 on LHS and 2 on RHS so add 2 H20 to the RHS H2SO4 ----------> SO2 + 2 H2O 3. Balance hydrogen atoms with H+ There are 2 on LHS and 4 on RHS so
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