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Question: Which of the following is the cell reaction that occurs when the following half cells are combined? ...

Which of the following is the cell reaction that occurs when the following half cells are combined?

I2+2e−→2I−(1M);Eº=+0.54VI_{2} + 2e^{-} \rightarrow 2I^{-}(1M);Eº = + 0.54V

Br2+2e−→2Br−(1M);Eº=+1.09VBr_{2} + 2e^{-} \rightarrow 2Br^{-}(1M);Eº = + 1.09V

A

2Br−+I2→Br2+2I−2Br^{-} + I_{2} \rightarrow Br_{2} + 2I^{-}

B

I2+Br2→2I−+2Br−I_{2} + Br_{2} \rightarrow 2I^{-} + 2Br^{-}

C

2I−+Br2→I2+2Br−2I^{-} + Br_{2} \rightarrow I_{2} + 2Br^{-}

D

2I−+2Br→I2+Br22I^{-} + 2Br \rightarrow I_{2} + Br_{2}

Answer

2I−+Br2→I2+2Br−2I^{-} + Br_{2} \rightarrow I_{2} + 2Br^{-}

Explanation

Solution

2I−→I2+2e−(Oxidation)2I^{-} \rightarrow I_{2} + 2e^{-} (Oxidation)

Br2+2e−→2Br(Reduction)Br_{2} + 2e^{-} \rightarrow 2Br ({Re}duction)

2I−+Br2→I2+2Br−isnetcellreaction2I^{-} + Br_{2} \rightarrow I_{2} + 2Br^{-}isnetcellreaction