Respuesta :
Typical pH value of acid rain is 4.0 because rain combines with sulfur dioxide and nitrogen oxides which makes the rain more acidic (the typical value of clean rain is between 5.00-5.5) hope this helps at least
4.3 because when it comes in contact with sulfur dioxide or nitrogen oxide it makes it more acidic and the normal ph of rain is between 5.0 and 5.5