CrO3+2KOH=K2CrO4+H2O
2K2CrO4+H2SO4=K2Cr2O7+K2SO4+H2O
K2Cr2O7+14HBr=2KBr+2CrBr3+3Br2+7H2O
Br2+H2S=2HBr+S
CrO3+2KOH=K2CrO4+H2O
2K2CrO4+H2SO4=K2Cr2O7+K2SO4+H2O
K2Cr2O7+14HBr=2KBr+2CrBr3+3Br2+7H2O
Br2+H2S=2HBr+S