Sodium oxalate has the formula Na2C2O4. Based on this information the formula for iron(III) oxalate is Chemistry Sodium oxalate has the formula Na2C2O4. Based on this information the formula for iron(III) oxalate is A) FeC2O4 B) Fe(C2O4)2 C) Fe(C2O4)3 D) Fe2(C2O4)3 E) Fe3(C2O4)2 Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+