S-h2s-so2-so3-khso4-k2so4

Question

S-h2s-so2-so3-khso4-k2so4

Answer 1

1) H2 + S ⇄ H2S
2)2H2S+3O2 ⇄ 2SO2+2H2O (250-300°C)
3)2SO2 + O2 = 2SO3(400-500°C)
4) SO3 + KOH = KHSO4 
5)KHSO4 + KOH → K2SO4 + H2O