At the Oak Ridge National Laboratory in Tennessee, soils are heavily contaminated with mercury (Hg+2). In some of the soils, sulfate-reducing bacteria are producing bisulfide (HS'). In these soils, mercury precipitates with sulfide to form metacinnabar (HgS(). -2 HgS +H +Hg +HS (3), a. What is the equilibrium constant for this reaction? Assume a temperature of 25 °C. b. What is the effective equilibrium constant for an ionic strength of 0.01 M (call it Keeff)? Use the Davies equation to make the calculation

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Chapter1: Chemical Foundations
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At the Oak Ridge National Laboratory in Tennessee, soils are heavily contaminated
with mercury (Hg*2). In some of the soils, sulfate-reducing bacteria are producing
bisulfide (HS). In these soils, mercury precipitates with sulfide to form metacinnabar
(HgS(s).
HgS +H" Hg +HS
(3),
a. What is the equilibrium constant for this reaction? Assume a temperature
of 25 °C.
b. What is the effective equilibrium constant for an ionic strength of 0.01 M
(call it Kegeff)? Use the Davies equation to make the calculation
Transcribed Image Text:At the Oak Ridge National Laboratory in Tennessee, soils are heavily contaminated with mercury (Hg*2). In some of the soils, sulfate-reducing bacteria are producing bisulfide (HS). In these soils, mercury precipitates with sulfide to form metacinnabar (HgS(s). HgS +H" Hg +HS (3), a. What is the equilibrium constant for this reaction? Assume a temperature of 25 °C. b. What is the effective equilibrium constant for an ionic strength of 0.01 M (call it Kegeff)? Use the Davies equation to make the calculation
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