1) Sulfur dioxide (SO2) -> Sulfurous acid (H2SO3) -> Potassium sulfite (K2SO3) -> Lead(II) sulfite (PbSO3)2) Calcium oxide (CaO) -> Calcium hydroxide (Ca(OH)2) -> Calcium nitrate (Ca(NO3)2) -> Calcium carbonate (CaCO3) -> Calcium chloride (CaCl2)
1) Sulfur dioxide (SO2) -> Sulfurous acid (H2SO3) -> Potassium sulfite (K2SO3) -> Lead(II) sulfite (PbSO3)
2) Calcium oxide (CaO) -> Calcium hydroxide (Ca(OH)2) -> Calcium nitrate (Ca(NO3)2) -> Calcium carbonate (CaCO3) -> Calcium chloride (CaCl2)