Answer the following in one or two sentences. Formulate a cell from the following electrode reactions: Au(aq)3++3e-→Au(s) Mg(s) → Mg(aq)2+ + 2e- - Chemistry

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Short Note

Answer the following in one or two sentences.

Formulate a cell from the following electrode reactions:

`"Au"_(("aq"))^(3+) + 3"e"^(-) -> "Au"_(("s"))`

Mg(s) → `"Mg"_(("aq"))^(2+)` + 2e-

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Solution

The oxidation half-reaction at the anode is

Mg(s) → `"Mg"_(("aq"))^(2+)` + 2e-

The reduction half-reaction at cathode is

`"Au"_(("aq"))^(3+) + 3"e"^(-) -> "Au"_(("s"))`

Notation for anode: Mg(s) `"Mg"_(("aq"))^(2+)`
Notation for cathode: `"Au"_(("aq"))^(3+)` Au(s)

Cell formula:

Mg(s) |`"Mg"_(("aq"))^(2+)`| |`"Au"_(("aq"))^(3+)`| Au(s) 

Concept: Galvanic or Voltaic Cell
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Chapter 5: Electrochemistry - Exercises [Page 118]

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Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 5 Electrochemistry
Exercises | Q 2.08 | Page 118
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