Rainwater is slightly acidic due to dissolved CO2. Use the following data to calculate the pH of unpolluted rainwater at 26.8°C: vol % in air of CO2 = 0.088 vol%; solubility of CO2 in pure water at 26.8°C and 1.36 atm is 80.6 mL CO2 per 100 mL, K,1 of H2CO3 = 5.54x10-7. Express the pH with 2 decimals. You might have to solve a quadratic.

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Q: precipitation

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