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Use the half-reaction method to balance each redox reaction occurring in acidic aqueous

Chapter 16, Problem 65P

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QUESTION:

Use the half-reaction method to balance each redox reaction occurring in acidic aqueous solution.

(a) \(\mathrm{PbO}_{2}(s)+\mathrm{I}^{-}(a q) \longrightarrow \mathrm{Pb}^{2+}(a q)+\mathrm{I}_{2}(s)\)

(b) \(\mathrm{SO}_{3}^{~2-}(a q)+\mathrm{MnO}_{4}^{-}(a q) \longrightarrow \mathrm{SO}_{4}^{~2-}(a q)+\mathrm{Mn}^{2+}(a q)\)

(c) \(\mathrm{S}_{2} \mathrm{O}_{3}^{~2-}(a q)+\mathrm{Cl}_{2}(g) \longrightarrow \mathrm{SO}_{4}^{~2-}(a q)+\mathrm{Cl}^{-}(a q)\)

Equation Transcription:

Text Transcription:

PbO_2(s)+I-(aq) rightarrow Pb_2+(aq)+I2(s)

SO_3^2-(aq)+MnO_4- rightarrow SO_4^2-(aq)+Mn^2+(aq)

S2O_3^2-(aq)+Cl_2(g) rightarrow SO_4^2-(aq)+Cl^-(aq)

Questions & Answers

QUESTION:

Use the half-reaction method to balance each redox reaction occurring in acidic aqueous solution.

(a) \(\mathrm{PbO}_{2}(s)+\mathrm{I}^{-}(a q) \longrightarrow \mathrm{Pb}^{2+}(a q)+\mathrm{I}_{2}(s)\)

(b) \(\mathrm{SO}_{3}^{~2-}(a q)+\mathrm{MnO}_{4}^{-}(a q) \longrightarrow \mathrm{SO}_{4}^{~2-}(a q)+\mathrm{Mn}^{2+}(a q)\)

(c) \(\mathrm{S}_{2} \mathrm{O}_{3}^{~2-}(a q)+\mathrm{Cl}_{2}(g) \longrightarrow \mathrm{SO}_{4}^{~2-}(a q)+\mathrm{Cl}^{-}(a q)\)

Equation Transcription:

Text Transcription:

PbO_2(s)+I-(aq) rightarrow Pb_2+(aq)+I2(s)

SO_3^2-(aq)+MnO_4- rightarrow SO_4^2-(aq)+Mn^2+(aq)

S2O_3^2-(aq)+Cl_2(g) rightarrow SO_4^2-(aq)+Cl^-(aq)

ANSWER:

Step 1

(a) PbO2(s) + I(aq) → Pb2+ (aq) + I2(s)

The balanced chemical equation is,

PbO2 +2I- + 4H+ → I2 + Pb2+ + 2H2O

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