is the mass of the oxalic acid (diprotic acid) in the sample and what is its mass percent? (0.753 g, added. The sample requires 34.47 mL of 0.485 M NAOH to reach the equivalence points. What 6. A 1.034 g sample of impure oxalic acid (H2C2O4) is dissolved in water and acid-base indicator CHM 1045 Unit 3: Solutions/Redox/Gases 72.8%)

is the mass of the oxalic acid (diprotic acid) in the sample and what is its mass percent? (0.753 g, added. The sample requires 34.47 mL of 0.485 M NAOH to reach the equivalence points. What 6. A 1.034 g sample of impure oxalic acid (H2C2O4) is dissolved in water and acid-base indicator CHM 1045 Unit 3: Solutions/Redox/Gases 72.8%)

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter16: Applications Of Neutralization Titrations

Section: Chapter Questions

Problem 16.48QAP

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Lead poisoning has been a hazard for centuries. Some scholars believe that the decline of the Roman Empire can be traced, in part, to high levels of lead in water from containers and pipes, and from wine that was stored in leadglazed containers. If we presume that the typical Roman water supply was saturated with lead carbonate, PbCO3 (Ksp = 7.4 1014), how much lead will a Roman ingest in a year if he or she drinks 1 L/day from the container?
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On Easter Sunday, April 3, 1983, nitric acid spilled from a tank car near downtown Denver, Colorado. The spill was neutralized with sodium carbonate: 2HNO3(aq)+Na2CO3(aq)2NaNO3(aq)+H2O(l)+CO2(g) a. Calculate H for this reaction. Approximately 2.0 104 gal nitric acid was spilled. Assume that the acid was an aqueous solution containing 70.0% HNO3 by mass with a density of 1.42 glcm3. What mass of sodium carbonate was required for complete neutralization of the spill, and what quantity of heat was evolved? (Hf for NaNO3(aq) = 467 kJ/mol) b. According to The Denver Post for April 4, 1983, authorities feared that dangerous air pollution might occur during the neutralization. Considering the magnitude of H, what was their major concern?
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