ElectrochemistrymediumMCQ SINGLE

A diatomic gas at is bubbled through an aqueous solution containing a mixture of and at . If the staElectrochemistry Chemistry Question

Question

A diatomic gas $X_2$ at $1\text{ atm}$ is bubbled through an aqueous solution containing a mixture of $1\text{ M } Y^-$ and $1\text{ M } Z^-$ at $25^\circ\text{C}$. If the standard reduction potentials of the corresponding non-metals follow the order $Z_2 > Y_2 > X_2$, which of the following describes the correct redox outcome?

Answer: A

💡 Solution & Explanation

A halogen or non-metal with a higher standard reduction potential will spontaneously oxidize the anion of a non-metal with a lower reduction potential. Since the reduction potential of $Y_2 > X_2$, $Y_2$ can oxidize $X^-$ to $X_2$. However, since $Y_2 < Z_2$, $Y_2$ cannot oxidize $Z^-$.

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