Guzman Malone
09/01/2023 · Middle School
( 6 marks) Consider the unbalanced reaction below, which occurs in an acidic aqueous solution. \[ \mathrm{MnO}_{4}{ }^{-}+\mathrm{Cl}^{-}\left(\mathrm{Cl}_{2}+\mathrm{Mn}^{2+}\right. \] a. Identify the half-reactions (oxidation, reduction) (1 marks) b. Balance the reduction equation ( 2 marks) c. Balance the oxidation equation ( 2 marks) d. Balance the overall equation (1 marks)
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a. Reduction: \(\mathrm{MnO}_{4}^{-} \rightarrow \mathrm{Mn}^{2+}\), Oxidation: \(2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_{2}\)
b. Reduction equation: \(\mathrm{MnO}_{4}^{-} + 8 \mathrm{H}^{+} + 5 e^{-} \rightarrow \mathrm{Mn}^{2+} + 4 \mathrm{H}_{2}\mathrm{O}\)
c. Oxidation equation: \(2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_{2} + 2 e^{-}\)
d. Balanced overall equation: \(2 \mathrm{MnO}_{4}^{-} + 10 \mathrm{Cl}^{-} + 16 \mathrm{H}^{+} \rightarrow 2 \mathrm{Mn}^{2+} + 5 \mathrm{Cl}_{2} + 8 \mathrm{H}_{2}\mathrm{O}\)
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