1. Calculate a predominance diagram showing the solubility of Ferric hydroxide [Fe(OH)3(s)] as a function of solution pH by plotting the logarithm of the concentration of each iron species against pH assuming the solution is in contact with ferric hydroxide mineral. (10 pts) Before beginning, answer these questions: i) Is this solution open or closed with respect to iron? (2 pts) ii) If open, what is the reservoir for iron? (2 pts) 2. Now plot the same diagram showing the logarithm of iron species concentration as a function of pH for a solution in equilibrium with Ferric hydroxide but that also contains 0.001 moles/kg of dissolved fluoride. Fluoride can form iron complexes via this reaction: FeF+2(aq) + 3 H₂O(1) = Fe(OH)3(s) + 3 H*(aq) + F¯(aq) Include this latter species FeF+2(aq) in the diagram. Ignore all other Fe-F complexes. (16 pts)

1. Calculate a predominance diagram showing the solubility of Ferric hydroxide [Fe(OH)3(s)] as a function of solution pH by plotting the logarithm of the concentration of each iron species against pH assuming the solution is in contact with ferric hydroxide mineral. (10 pts) Before beginning, answer these questions: i) Is this solution open or closed with respect to iron? (2 pts) ii) If open, what is the reservoir for iron? (2 pts) 2. Now plot the same diagram showing the logarithm of iron species concentration as a function of pH for a solution in equilibrium with Ferric hydroxide but that also contains 0.001 moles/kg of dissolved fluoride. Fluoride can form iron complexes via this reaction: FeF+2(aq) + 3 H₂O(1) = Fe(OH)3(s) + 3 H*(aq) + F¯(aq) Include this latter species FeF+2(aq) in the diagram. Ignore all other Fe-F complexes. (16 pts)

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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