(Solution) - A 3 00 L sample of urban air was bubbled through a -(2025 Original AI-Free Solution)

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A 3.00-L sample of urban air was bubbled through a solution containing 50.0 mL of 0.0116 M Ba(OH)2, which caused the CO2 in the sample to precipitate asBaCO3. The excess base was back-titrated to a phenolphthalein end point with 23.6 mL of 0.0108 M HCl. Calculate concentration of CO2 in the air in parts per million (that is, mL CO2/106 mL air); use 1.98 g/L for the density of CO2.