1. Air (at 1 atm) contains 400 ppm carbon dioxide (CO2). After the rainwater and air are completely mixed and balanced,

[answerhappygod]

1 Air At 1 Atm Contains 400 Ppm Carbon Dioxide Co2 After The Rainwater And Air Are Completely Mixed And Balanced 1 (24.12 KiB) Viewed 12 times

1. Air (at 1 atm) contains 400 ppm carbon dioxide (CO2). After the rainwater and air are completely mixed and balanced, the rainwater infiltrates into the groundwater layer containing calcium carbonate (CaCO3). H.O - H+ + OH K = 104 M CO2)+H20 - H.CO Ky = 10-15 (= 3.16 x 104) M atm H.COZ HCO3+H* K1 = 1063 (=5.0 x 107) HCO, CO,? +H K2 = 10-10.3 (=5.0 10") M CaCO36) 00, +Ca? K.p - 10-8 (-5.0 x 109) M (1) Calculate the pH of the rainwater before mixing and balancing with air? (2) Calculate the pH of the rainwater after mixing and balancing with air?