Role of nh3 in acid rain Ammonia dissolved in rainwater scavenges h+ NH3 (aq)+H+t=NH4+ Ammonia input lowers the acidity in rain Ion Rural New York Southwest Minnesota (μeq/) μeq/) H+(pH)46(4.34) 0.5(6.31) SO245 416 NO3- 25 24 HCO 0.1 10 NH+ 8.3 38 The larger input of NH3 in MN is responsible for the lower rain acidity than in NYRole of NH3 in acid rain • Ammonia dissolved in rainwater scavenges H+: – NH3 (aq) + H+ = NH4+ • Ammonia input lowers the acidity in rain. Ion Rural New York Southwest Minnesota (meq/l) (meq/l) H+(pH) 46 (4.34) 0.5 (6.31) SO4 2- 45 46 NO3 - 25 24 HCO3 - 0.1 10 NH4 + 8.3 38 The larger input of NH3 in MN is responsible for the lower rain acidity than in NY