CHEM question

Fe2O3 個Fe係3+..O係2-
Fe3O4 個Fe係4+..O係3-
不過正常都唔會出Fe3O4 掛..應該響d equation到出現
Fe2O3 叫Fe(III)oxide..

Fe2O3 and Fe3O4 are two different compounds, both are mainly ionic.

Fe2O3 is named as iron(III) oxide. In its lattice, there are Fe3+ and O2- ions in mole ratio 2:3.

Fe3O4 is named as iron(II) iron(III) oxide, and its formula is sometimes written as FeO•Fe2O3. In its lattice, there are Fe2+, Fe3+ and O2- ions in mole ratio 1 : 1 : 4.

2007-03-16 17:46:23 補充：
答案錯誤。Fe^4+ 與 O^3- 根本不存在。