In sediments and waterlogged soil, dissolved O2 concentrations are so low that t

Question

In sediments and waterlogged soil, dissolved O2 concentrations are so low that the microorganisms living there must rely on other sources of oxygen for respiration. Some Bacteria can extract the oxygen in sulfate ions, reducing the Sulfur in them to hydrogen sulfide gas and going the sediments or soil a distinctive rotten-egg odor a. What is the oxidation number of sulfur in these compounds ? b. Write the net ionic equation foe the reaction under acidic conditions (H3O+) that releases O2 from sulfate and forms hydrogen sulfide gas. Use water as the reactant as the hart-reaction that describes the formation of oxygen.

Explanation / Answer

a) Oxidation state of Oxygen in SO42- = +6

And in H2S = 2-

b) 2H3O+(aq)+SO4 2-(aq)-->H2S(g)+2O2(g)+2H2O(l.

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