Calcium in powdered milk is determined by dry ashing a 1.50-g sample and then titrating the calcium with EDTA solution; 12.1 mL is required. The EDTA was standardized by titrating 10.0 mL of a zinc solution prepared by dissolving 0.632 g zinc metal in acid and diluting it to 1 L (10.8 mL EDTA required for titration). What is the concentration of calcium in the powdered milk in parts per million? is the correct answer 2.89 ppm?

Calcium in powdered milk is determined by dry ashing a 1.50-g sample and then titrating the calcium with EDTA solution; 12.1 mL is required. The EDTA was standardized by titrating 10.0 mL of a zinc solution prepared by dissolving 0.632 g zinc metal in acid and diluting it to 1 L (10.8 mL EDTA required for titration). What is the concentration of calcium in the powdered milk in parts per million? is the correct answer 2.89 ppm?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter10: Fuels, Organic Chemicals, And Polymers

Section: Chapter Questions

Problem 115QRT

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Calcium in powdered milk is determined by dry ashing a 1.50-g sample and then titrating the calcium with EDTA solution; 12.1 mL is required. The EDTA was standardized by titrating 10.0 mL of a zinc solution prepared by dissolving 0.632 g zinc metal in acid and diluting it to 1 L (10.8 mL EDTA required for titration). What is the concentration of calcium in the powdered milk in parts per million?
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