Explain 6 and 7. and. Pro 6. (4 pts) Consider the potential diagram in acid solu

Question

Explain 6 and 7. and. Pro 6. (4 pts) Consider the potential diagram in acid solution bellow; whi species are prone disproportionation? 2- -0.4V Reo2 -0.7V Reo -0.6V Re ReO A. Reo4 ReO2 CCL Reon D. Re E. none of the above 7. (4 pts) A common analytical oxidizing agent in acidic solution is the manganate ion, Mno4-, for which the standard potential, E0 +1.51 V. Which of the following species, can manganate oxidize in acidic solution? (Table of selecte E6 is attached at the end of the exam. A. Ce3+, Mn B. Ce3+, F- C. I D. F, H20 E. Cest, I

Explanation / Answer

This is how you find out which species is prone to disproportionation :

An unstable species or a species prone to disproportionation will have a lower standard potential to the left than to the right.Such that the difference between the potential to the right and the potential to the left will always be positive depicting spontaneous disproportionation.

In the diagram given, for ReO42-

E° = -0.4-(-0.7) = 0.7 -0.4 = 0.3V (spontaneous disproportionation)

ReO42- ---> ReO2 + ReO4- E° = +0.3V

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