When SO2 dissolves in water, it forms sulfurous acid (H2SO3), which can be further ionized to form bisulfite ions (HSO3-) and sulfite ions (SO32-). The reaction can be represented as follows:
SO2 + H2O → H2SO3
N2O5, on the other hand, reacts with water to form nitric acid (HNO3), which is a strong acid. The reaction can be represented as follows:
N2O5 + H2O → 2HNO3
Therefore, SO2 forms sulfurous acid (H2SO3) and N2O5 forms nitric acid (HNO3) when they react with water.