Hydrogen sulfide is characterized by a rotten egg smell. This odorous gas can be removed from wastewater by stripping. Given H2SH++HS;Ka=0.86107 i. What fraction of hydrogen sulfide is in the H2S form at pH 6.0 ? b. What fraction of hydrogen sulfide is in the H2S form at pH9.0 ? ii. You are given the choice to add either sulfuric acid or magnesium hydroxide to adjust the pH of a neutral (pH=7) wastewater prior to stripping. iii. Which would you choose to add and why