Question

[Ngoc Thuy]

Fe(OH)2+O2+H2O -> Fe(OH)3 FeCl2+NAOH -> Fe(OH)2+NaCl MnO2+HBr -> Br2+ MnBr2 +H2O FeS2+O2 -> Fe2O3 + SO2 Cu + H2SO4 (đặc) -> CuSO4 +SO2+H2O

Answer 1

[๖ۣۜDũ๖ۣۜN๖ۣۜG]

\(4Fe\left(OH\right)_2+O_2+2H_2O\rightarrow4Fe\left(OH\right)_3\)

\(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2\downarrow+2NaCl\)

\(MnO_2+4HBr\rightarrow MnBr_2+Br_2+2H_2O\)

\(4FeS_2+11O_2\underrightarrow{t^o}2Fe_2O_3+8SO_2\)

\(Cu+2H_2SO_4\rightarrow CuSO_4+SO_2+2H_2O\)