Which of the following equations represents a correctly balanced half-reaction for…

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

Which of the following equations represents a correctly balanced half-reaction for the oxidation of I2\text{I}_2 to IO3−\text{IO}_3^- in acidic solution? (a) I2+6 H2O→2 IO3−+12 H++5 e−\text{I}_2+6\,\text{H}_2\text{O}\rightarrow 2\,\text{IO}_3^-+12\,\text{H}^++5\,e^- (b) 2 IO3−+12 H++10 e−→I2+6 H2O2\,\text{IO}_3^-+12\,\text{H}^++10\,e^-\rightarrow \text{I}_2+6\,\text{H}_2\text{O} (c) I2+6 H2O→2 IO3−+12 H++10 e−\text{I}_2+6\,\text{H}_2\text{O}\rightarrow 2\,\text{IO}_3^-+12\,\text{H}^++10\,e^- (d) I2+12 H2O→2 IO3−+24 H++10 e−\text{I}_2+12\,\text{H}_2\text{O}\rightarrow 2\,\text{IO}_3^-+24\,\text{H}^++10\,e^-

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