An iron ore sample is analyzed for iron content by dissolving a 1.6800 g iron
ore sample in acid to convert all forms of the iron present to Fe2+, then titrating
with standard 0.0150M K2Cr2O7 solution according to
6Fe2+ + Cr2O7
2- + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O
The volume of Cr2O7
2- solution required in the titration was 35.60 mL. How
much of the ore sample is iron oxide, calculated as Fe2O3, and expressed as a
percentage.

Question

An iron ore sample is analyzed for iron content by dissolving a 1.6800 g iron
ore sample in acid to convert all forms of the iron present to Fe2+, then titrating
with standard 0.0150M K2Cr2O7 solution according to
6Fe2+ + Cr2O7
2- + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O
The volume of Cr2O7
2- solution required in the titration was 35.60 mL. How
much of the ore sample is iron oxide, calculated as Fe2O3, and expressed as a
percentage.

anonymous · Answer

I calculated and get answer= 10.65% , is it correct ?