CH1012
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BALANCING REDOX EQNS III
Balancing a redox rxn in Basic Solution
Balance as per
acidic solution steps 1 - 8.
9)
Add OH- to both sides of balanced
eqn.,
the no of OH- added = no of H+ in eqn.
the no of OH- added = no of H+ in eqn.
10) Add the OH- and H+ on the same side
of each half rxn to form water(s).
of each half rxn to form water(s).
11) Cancel waters (LHS vs RHS)
12) Do an atom
balance LHS = RHS.
Balancing a redox reaction
e.g. given Cr2O72-(aq + Fe2+(aq ® Cr3+(aq + Fe3+(aq
e.g. given Cr2O72-(aq + Fe2+(aq ® Cr3+(aq + Fe3+(aq
balanced equation in acidic solution.
Cr2O72-(aq) + 14H+(aq + 6Fe2+(aq® 2Cr3+(aq+ 7H2O(l) + 6Fe3+(aq
