Determination of Oxalate by Titration. Lab 9. Outline. Purpose Redox Reaction Procedure Calculation Sequence Glassware Setup Safety Concerns Waste Next Lab Reminder. Purpose. Analyze three unknown samples for oxalate via titration.
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Half reaction for the oxidation of C2O42-:
C2O42-(aq) 2CO2(g) + 2e-
Half reaction for the reduction of Mn7+:
8H+(aq) + MnO4-(aq) + 5e- Mn2+(aq) + 4H2O(l)
16H+(aq) + 5C2O42-(aq) + 2MnO4-(aq) 10CO2(g) + 8H2O(l) + 2Mn2+(aq)
Sample calculations are on pp. 222 and 223