Question

balance the following equation :- K2Cr2O7 + H2SO4 +H2S = K2SO4 + Cu2(SO4)3 + H2O + S

Answer 1

20 K2Cr2O7 + 35 H2S + 45 H2SO4 = 20 K2SO4 + 20 Cr2(SO4)3 + 8 H20
{there will not S in the end}