
CaSO_3 " alt="2.SO_2+CaO=>CaSO_3 " align="absmiddle" class="latex-formula">
H_2SO_3 " alt=" 3.SO_2+H_2O=>H_2SO_3 " align="absmiddle" class="latex-formula">
K_2SO_3 +H_2O " alt="4.SO_2+2KOH => K_2SO_3 +H_2O " align="absmiddle" class="latex-formula">
BaSO_3+H_2O " alt="5.SO_2+Ba(OH)_2=>BaSO_3+H_2O " align="absmiddle" class="latex-formula">
