$2Fe^{+3}_xO^{-2}_2+ (6x-2y)H_2SO_4\rightarrow xFe_2(SO_4)_3 +(3x-2y)S^{+6}O^{-2}_2$ e cho nhận$3x-2y 6-2.2=2$ $+(6x-2y)H_2O$
$2Fe^{+3}_xO^{-2}_
y+ (6x-2y)H_2SO_4\rightarrow xFe_2(SO_4)_3 +(3x-2y)S^{+6}O^{-2}_2$ e cho nhận$3x-2y 6-2.2=2$ $+(6x-2y)H_2O$