Cr(+2) + 2OH- → Cr(OH)2(s)

Cr(+2) + 2Cl- → CrCl2(s)

Cr(+2) + 2I- → CrI2(s)

2Cr(+2) + 3O2 → 2CrO3

Cr(+2) + 2Ag+ → Cr2+ + 2Ag

Cr(+2) + H2O → CrO + 2H+ + 2e-