Balance each redox reaction occurring in acidic aqueous solution. b. Mg(s) + Cr"(aq) Mg"(aq) + Cr(s)

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Balance each redox reaction occurring in acidic aqueous
solution.
b. Mg(s) + Cr"(aq)
Mg"(aq) + Cr(s)
Transcribed Image Text:Balance each redox reaction occurring in acidic aqueous solution. b. Mg(s) + Cr"(aq) Mg"(aq) + Cr(s)
Expert Solution
Step 1

We have following redox reaction

Mg (s) + Cr+3 (aq)  → Mg+2 (aq)+ Cr(s)

Step 1:

Separate the overall reaction into two half reactions: One for oxidation and one for reduction.

Oxidation: Mg(s) --> Mg+2 (aq)

Reduction: Cr+3 (aq) --> Cr(s)

In these half reactions all elements are balanced. Hence in the next step we need to balance the charge.

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