Balancing Redox Reactions Video Lessons

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Problem: A disproportionation  reaction is an oxidation-reduction reaction in which the same substance is oxidized and reduced. Complete and balance the following disproportionation reactions.Ni+(aq)  →  Ni2+(aq) + Ni(s)  (acidic  solution)

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We have to balance the given disproportionation reaction.

Ni+(aq) → Ni2+(aq) + Ni(s)                    (acidic solution)


Recall the mnemonics LEO GER.

Lose               Gain

Electron         Electrons

Oxidation       Reduction


Loss of electrons → oxidation

Gain of electrons → reduction


A redox reaction can be balanced (in acidic solution) by these steps:

Step 1: Separate the whole reaction into two half-reactions.

Step 2: Balance the non-hydrogen and non-oxygen elements first.

Step 3: Balance oxygen by adding H2O to the side that needs oxygen. (1 O: 1 H2O)

Step 4: Balance hydrogen by adding H+ to the side that needs hydrogen. (1 H: 1 H+)

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Problem Details

A disproportionation  reaction is an oxidation-reduction reaction in which the same substance is oxidized and reduced. Complete and balance the following disproportionation reactions.

Ni+(aq)  →  Ni2+(aq) + Ni(s)  (acidic  solution)

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