When naturally-occurring arsenic becomes solubilized and contaminates water sources, it can result in arsenic poisoning.

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When Naturally Occurring Arsenic Becomes Solubilized And Contaminates Water Sources It Can Result In Arsenic Poisoning 1 (75.88 KiB) Viewed 48 times

When naturally-occurring arsenic becomes solubilized and contaminates water sources, it can result in arsenic poisoning. Also, arsenic with the oxidation state in H3ASO3 is more toxic than it is in H3ASO4, so determining the prevalent forms of arsenic is important. c. Write a balanced (in acid) one electron half-reaction for the reduction of H3AsO4(aq) to H3AsO3(aq). (show your work and upload to Gradescope: worth 4 points). d. Given that the standard Ecell for the reduction half-reaction is +0.56 V, write an equation for pE in terms of pH and the ratio of the two arsenic- containing species. (show your work and upload to Gradescope: worth 4 points). e. The pH of a particular sample is 2.00, and the pE is dominated by the presence of O2, and although it's not completely saturated with O2, the pE value is 8.69. What is the ratio of H3ASO3(aq) to H3ASO4(aq) in this system? (4 points)