Balancing Redox Reactions Video Lessons

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Problem: Balance redoxNi(s) + Cd2+(aq) → Ni2+(aq) + Cd(s)Mg(s) + Cr3+(aq) → Mg2+(aq) + Cr(s)

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Given reaction: Ni(s) + Cd2+(aq) → Ni2+(aq) + Cd(s)


Step 1: Separate half-reactions:

Ni(s) → Ni2+(aq)                                        Cd2+(aq) → Cd(s)


Step 2: Balance the charges:

Ni(s) → Ni2+(aq) + 2 e                             Cd2+(aq) + 2 e → Cd(s)

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Problem Details

Balance redox

Ni(s) + Cd2+(aq) → Ni2+(aq) + Cd(s)

Mg(s) + Cr3+(aq) → Mg2+(aq) + Cr(s)

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