Hydrogen sulfide (HS−) can be oxidized to by microorganisms that grow inside sewer pipes,...

Hydrogen sulfide (HS−) can be oxidized to by microorganisms that grow inside sewer pipes, resulting in the corrosion of concrete from the acid produced.

(a) If the concentration of HS− in the sewage is 2.5 mg · L−1, what is the concentration of sulfate that would result, assuming that conversion is 100%?

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(b) Assuming that the electron acceptor is acetate, determine the ΔG° for this reaction and state if it is thermodynamically feasible.

The half-reaction for HS−