Question

Write the empirical formula for at least four ionic compounds that could be formed from the following ions: Fe2+,Cr4+,Cl-,O2-

Answer 1

The empirical formulas for four ionic compounds that could be formed from the given ions:

Iron(II) chloride: Fe2+ + 2Cl- → FeCl2

Iron(III) oxide: 2Fe3+ + 3O2- → Fe2O3

Chromium(IV) chloride: Cr4+ + 4Cl- → CrCl4

Chromium(IV) oxide: 2Cr4+ + 3O2- → Cr2O3