b. Will vo2+ disproportionate or will V3. and VO2 comproportionate to form V02+ under acidic conditions? Explain.

An industrial chemist treats solid NaCl with concentrated H₂SO₄ and obtains gaseous HCl and NaHSO₄. When she substi-tutes solid NaI for NaCl, gaseous H₂S, solid I₂, and S₈ are ob-tained but no HI. (a) What type of reaction did the H₂SO₄ undergo with NaI? (b) Why does NaI, but not NaCl, cause thistype of reaction? (c) To produce HI(g) by the reaction of NaI with an acid, how does the acid have to differ from sulfuric acid?

Excessive nutrients dumped into waterways can create “algae blooms” that rapidly consume all of the dissolved O2 and trigger production of enough H2S to create “dead zones” like the ones that exist off the coast of Denmark and in the Gulf of Mexico immediately south of the Mississippi River delta. a.  Since Group 16 element substitution is a recurring theme in that Group’s chemistry –e.g., oxygen substituting for Se and Te in the production of H2Se and H2Te, respectively –maybe molecular oxygen (O2) could be bubbled into these dead zones and react with the H2S.Write out a balanced chemical equation for the reaction between H2S and O2 to form elemental sulfur (S8) as a product that would precipitate out.   b.  Using bond dissociation energies, calculate if this reaction would be thermodynamically favorable.   c. If your answer to part (b) is “yes”, do you think that simply bubbling O2 into these waters would work? Justify your answer.

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