Question

Given that

$I_{2}+2e^{-} \rightarrow 2I^{\ominus};E^{\ominus}=0.54$ V

$Br_{2}+2e^{-} \rightarrow 2Br^{\ominus};E^{\ominus}=1.69$ V

Predict which of the following is true

• A. $I^{\ominus}$ ions will be able to reduce bromine
• B. $Br^{\ominus}$ ions will be able to reduce iodine
• C. Iodine will be able to reduce bromine
• D. Bromine will be able to reduce iodide ions

Answer 1

Answer: (A)

Since the reduction potential of $Br_{2}\left|\right.2Br^{\ominus}$ is greater than the reduction potential of $I_{2}\left|\right.2I^{\ominus}$ , so $I^{\ominus}$ ions will reduce $Br_{2}$ .