pH and pOH | Chemistry | | Course Hero
Environmental Science Normal rainwater has a pH between 5 and 6 due to the presence of dissolved CO 2 which forms carbonic acid:. H 2 O(l)+ CO 2 (g) H 2 CO 3 (aq). H 2 CO 3 (aq) ⇌ H + (aq)+HCO 3 − (aq). Acid rain is rainwater that has a pH of less than 5, due to a variety of nonmetal oxides, including CO2, SO2, SO3, NO, and NO2 being dissolved in the water and reacting with it to form not ...
