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

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1 Air At 1 Atm Contains 400 Ppm Carbon Dioxide Co2 After The Rainwater And Air Are Completely Mixed And Balanced 1 (36.23 KiB) Viewed 9 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). H2O - H + OH Kr = 104 M CO2(g) + H2O - H2CO3 Ky=10-1.5 (=3.16 102) M atm H2CO3 → HCO3 + H K1 = 10-6-3 (=5.0 10) M HCO; CO2? +H* K22 - 10-10-3 ( = 5.0 x 10") M CaCO3() CO32- + Ca2+ Kp=10^(-5.0 x 10°) Mỏ (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?