Balance the following chemical equation (if necessary): H2SO«(aq) + Pb(OH)4(s) → Pb(SO4)2(s) + H2O(I)

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 giving the sediments or soil a distinctive rotten-egg odor.Write the net ionic equation for the reaction under acidic conditions (H3O+) that releases O2 from sulfate and forms hydrogen sulfide gas. Use water as the reactant in the half-reaction that describes the formation of oxygen.

Zinc metal reacts with nitric acid, HNO, to produce a number of products, depending on how dilute the acid solution is. In a concentrated salution, zinc reduces nitrate ion to ammonium ion; zinc is oxidized to zinc ion, Zn Write the net ionic equation for this reaction.

Be sure to answer all parts. Consider the following balanced redox reaction (do not include state of matter in your answers): 2CrO₂ (aq) + 2H₂O()+6C10 (aq) → 2CrO42 (aq) + 3Cl₂(g) + 40H (aq) (a) Which species is being oxidized? (b) Which species is being reduced? (c) Which species is the oxidizing agent? (d) Which species is the reducing agent? (e) From which species to which does electron transfer occur? Electrons transfer from to