Odpowiedź :
Cr2O3+6NaOH+3H2O--->2Na3[Cr(OH)6]
Cr2O3 +6Na+ +6OH- +3H2O --->6Na+ +2Cr(OH)6 3-
heksahydroksychromian sodu
Cr2O3+6HCl--->2CrCl3+3H2O
Cr2O3 +6H+ +6Cl- --->2Cr3+ +6Cl- +3H2O
chlorek chromu(III)
Cr2O3+6NaOH+3H2O--->2Na3[Cr(OH)6]
Cr2O3 +6Na+ +6OH- +3H2O --->6Na+ +2Cr(OH)6 3-
heksahydroksychromian sodu
Cr2O3+6HCl--->2CrCl3+3H2O
Cr2O3 +6H+ +6Cl- --->2Cr3+ +6Cl- +3H2O
chlorek chromu(III)