The predominant forms of heavy metals (Zn, Pb, Fe, Cu, Ni, etc.) in aerobic sediments are the carbonates and the oxide or hydroxide forms. An important consideration in modeling the sediment is the stable chemical form of the metal in question. Consider the reaction: AGO = 25 kJ/mol Pb(OH)₂ (s) + CO₂ (aq) ↔ PbCO3(s) + H₂O a. At what partial pressure of CO2(g) will Pb(OH)2(s) and PbCO3(s) be at equilibrium? b. If the system is at equilibrium with the atmosphere, Pco2=10-3.4 atm, calculate AG for the reaction. What is the stable form of lead in the sediments?

The predominant forms of heavy metals (Zn, Pb, Fe, Cu, Ni, etc.) in aerobic sediments are the carbonates and the oxide or hydroxide forms. An important consideration in modeling the sediment is the stable chemical form of the metal in question. Consider the reaction: AGO = 25 kJ/mol Pb(OH)₂ (s) + CO₂ (aq) ↔ PbCO3(s) + H₂O a. At what partial pressure of CO2(g) will Pb(OH)2(s) and PbCO3(s) be at equilibrium? b. If the system is at equilibrium with the atmosphere, Pco2=10-3.4 atm, calculate AG for the reaction. What is the stable form of lead in the sediments?

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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