### Selenium Reaction and Thermodynamics**Context:**Selenium is a constituent of many California soils but can become toxic to wildlife in certain forms. One of its acidic forms undergoes the following reaction:\[ \text{H}_2\text{SeO}_3 \, (\text{aq}) \rightleftharpoons \text{HSeO}_3^- \, (\text{aq}) + \text{H}^+ \, (\text{aq}) \]**Thermodynamic Constants:**| Species | ΔG°f (kJ/mol) | ΔH°f (kJ/mol) ||------------------|---------------|---------------|| H2SeO3 (aq) | -426.2 | -507.5 || HSeO3⁻ (aq) | -431.5 | -514.5 || H⁺ (aq) | 0.0 | 0.0 |**Tasks:**a. Calculate ΔG° for the chemical reaction above.b. Calculate the equilibrium constant at 25 °C for the reaction above.c. For the following system composition:- \([ \text{H}_2\text{SeO}_3 ] = 10^{-3} \, \text{M} \)- \([ \text{HSeO}_3^- ] = 10^{-3} \, \text{M} \)- pH = 4Determine whether the system is (a) at equilibrium, (b) moving toward products, or (c) moving toward reactants. Show work to justify your answer.

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3. Selenium is a constituent of many California soils but can become toxic to wildlife in certain of its forms. One of its acidic forms undergoes the following reaction: H₂SeO3 (aq) → HSeO3¯ (aq) + H+ (aq) You find the following thermodynamic constants: Species H₂SeO3(aq) HSeO3(aq) H+ (aq) AG (kJ/mol) AH (kJ/mol) -426.2 -507.5 -431.5 -514.5 0.0 0.0 a. Calculate AGº for the chemical reaction above. b. Calculate the equilibrium constant at 25 °C for the reaction above. c. For the following system composition: [H₂SeO3] = 10-3 M [HSeO3] = 10-³ M pH = 4 Determine whether the system is (a) at equilibrium, (b) moving toward products, or (c) moving toward reactants. Show work to justify your answer.

3. Selenium is a constituent of many California soils but can become toxic to wildlife in certain of its forms. One of its acidic forms undergoes the following reaction: H₂SeO3 (aq) → HSeO3¯ (aq) + H+ (aq) You find the following thermodynamic constants: Species H₂SeO3(aq) HSeO3(aq) H+ (aq) AG (kJ/mol) AH (kJ/mol) -426.2 -507.5 -431.5 -514.5 0.0 0.0 a. Calculate AGº for the chemical reaction above. b. Calculate the equilibrium constant at 25 °C for the reaction above. c. For the following system composition: [H₂SeO3] = 10-3 M [HSeO3] = 10-³ M pH = 4 Determine whether the system is (a) at equilibrium, (b) moving toward products, or (c) moving toward reactants. Show work to justify your answer.

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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