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A glycerol solution weighing 153.2 mg was treated with 50.0 mL of 0.0899 M Ce4+ in 4M HClO4 at 60 degrees C for 15 min to convert glycerol into formic acid:

C3H8O3 + 8Cefourplus + 3H2O ----> 3HCO2H + 8Cethreeplus + Fethreeplus

The excess Ce4+ required 10.05 mL of 0.043 7 M Fe2+ for a back titration by the reaction

Cefourplus + Fetwoplus ---> Cethreeplus + Fethreeplus

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