Chapter 12, Problem 2ASA

Substances ${\text{A}}_{\text{2}}$, ${\text{B}}_{\text{2}}$, and ${\text{C}}_{\text{2}}$ can all act as oxidizing agents. In solution, ${\text{A}}_{\text{2}}$ is green, ${\text{B}}_{\text{2}}$ is yellow, and ${\text{C}}_{\text{2}}$ is red. In the reactions in which they participate, they are reduced to ${\text{A}}^{-}$, ${\text{B}}^{-}$, and ${\text{C}}^{-}$ ions, all of which are colorless. When a solution of ${\text{C}}_{\text{2}}$ is mixed with one containing ${\text{B}}^{-}$ ions, the color changes from red to yellow.

Which species is oxidized? __________

Which is reduced? __________

When a solution of ${\text{C}}_{\text{2}}$ is mixed with one containing ${\text{A}}^{-}$ ions, the color remains red.

Is ${\text{C}}_{\text{2}}$ a better oxidizing agent than ${\text{A}}_{\text{2}}$? __________

Is ${\text{C}}_{\text{2}}$ a better oxidizing agent than ${\text{B}}_{\text{2}}$? __________

Arrange ${\text{A}}_{\text{2}}$, ${\text{B}}_{\text{2}}$, and ${\text{C}}_{\text{2}}$ in order of increasing strength as an oxidizing agent.

___________________ < _______________ < ______________

weakest oxidizing agent strongest oxidizing agent