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Twenty dietary iron tablets with a total mass of 131 g were ground and mixed thoroughly. Then 2.998 g of the powder were dissolved in HN03 and heated to convert all the iron to Fe3+ . Addition of NH3 caused quantitative precipitation of Fe2O3 x H20, which was ignited to give 0.264 g of Fe2O3 ( FM 159.69). What is the average mass of FeS04.7H20 ( FM 278.01) in each tablet?

Twenty dietary iron tablets with a total mass of 131 g were ground and mixed thoroughly. Then 2.998 g of the powder were dissolved in HN03 and heated to convert all the iron to Fe3+ . Addition of NH3 caused quantitative precipitation of Fe2O3 x H20, which was ignited to give 0.264 g of Fe2O3 ( FM 159.69). What is the average mass of FeS04.7H20 ( FM 278.01) in each tablet?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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  1. Twenty dietary iron tablets with a total mass of 131 g were ground and mixed thoroughly. Then 2.998 g of the powder were dissolved in HN03 and heated to convert all the iron to Fe3+ . Addition of NH3 caused quantitative precipitation of Fe2O3 x H20, which was ignited to give 0.264 g of Fe2O3 ( FM 159.69). What is the average mass of FeS04.7H20 ( FM 278.01) in each tablet?
  2. Consider a mixture of the two solids BaCl22H20 (FM 244.26) and KCl (FM 74.551). When the mixture is heated to 160 °C for 1 h, the water of crystallization is driven off. A sample originally weighing 1.7839 g weighed 1.5623 g after heating.
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