Multiple Choice
What is the balanced redox reaction for Cl2(g) + Mn2+(aq) → MnO2(s) + Cl-(aq) in a basic solution?
6. Chemical Quantities & Aqueous Reactions
Balancing Redox Reactions: Basic Solutions
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How do you balance half-reactions in a basic solution?
A
Add OH- to balance oxygen, then add H2O to balance hydrogen, and finally add electrons to balance charge.
B
Add H2O to balance oxygen, then add OH- to balance hydrogen, and finally add electrons to balance charge.
C
Add H2O to balance oxygen, then add H+ to balance hydrogen, and finally add OH- to neutralize H+.
D
Add electrons to balance charge, then add H2O to balance oxygen, and finally add OH- to balance hydrogen.
Verified step by step guidance1
Identify the half-reaction that needs to be balanced. Write down the unbalanced half-reaction equation.
Balance the oxygen atoms by adding H2O molecules to the side that needs more oxygen atoms.
Balance the hydrogen atoms by adding OH- ions to the side that needs more hydrogen atoms. This step is specific to basic solutions.
Balance the charge of the half-reaction by adding electrons (e-) to the more positive side or the side with a higher positive charge.
Ensure that the number of electrons lost in the oxidation half-reaction equals the number of electrons gained in the reduction half-reaction if combining half-reactions into a full redox reaction.
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