Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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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Question
I.
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:
Step 3
Reduction half reaction is:
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