I. Balance the ff. redox reactions. Balance them using water in acidic medium if necessary.   SO3−2 (aq) + MnO−4(aq) → SO4−2(aq) + Mn2+(aq)

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter3: Chemical Reactions
Section: Chapter Questions
Problem 67GQ: Bromine is obtained from sea water by the following redox reaction: Cl2(g) + 2 NaBr(aq) 2 NaCl(aq)...
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I. Balance the ff. redox reactions. Balance them using water in acidic medium if necessary.

 

SO3−2 (aq) + MnO−4(aq) → SO4−2(aq) + Mn2+(aq)

Expert Solution
Step 1

To balance the redox reactions in acidic medium, consider both the oxidation and reduction half cell reactions.

1) Add H+ ions to balance hydrogen atoms.

2) To balance O-atoms , add H2O molecules.

3) To balance the charge add electrons.

 

Step 2

Given unbalanced chemical equation is:

SO3−2 (aq) + MnO4 (aq) → SO4−2(aq) + Mn2+(aq)

 

Oxidation half reaction is:

Chemistry homework question answer, step 2, image 1

Step 3

Reduction half reaction is:

Chemistry homework question answer, step 3, image 1

 

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