K2Cr2O7 + 3(NH4)2S + H2O = 2Cr(OH)3 + 3S + 6NH3 + 2KOH.
3(NH4)2S + K2Cr2O7 + H2O = 6NH3 + 2Cr(OH)3 + 3S + 2KOH
K2Cr2O7 + 3(NH4)2S + H2O = 2Cr(OH)3 + 3S + 6NH3 + 2KOH.
3(NH4)2S + K2Cr2O7 + H2O = 6NH3 + 2Cr(OH)3 + 3S + 2KOH