Question

h20-o2-so2-so3-h2so4-k2so4-baso4

Answer 1

2H2O (t)= 2H2 + O2

S + O2 = SO2

2SO2 + O2 = 2SO3

SO3 + H2O = H2SO4

H2SO4 + 2K = K2SO4 + H2

K2SO4 + Ba(OH)2 = 2KOH + BaSO4.