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Chemistry · Unit 3 · Oxidation and reduction · Redox reactions

Explain that galvanic cells can be represented as cell diagrams, including anode and cathode half-equations.

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Question 1

A galvanic cell is constructed using a zinc electrode in \(1.0 \, \text{mol L}^{-1}\) zinc sulfate solution and a copper electrode in \(1.0 \, \text{mol L}^{-1}\) copper(II) sulfate solution. The cell is represented by the following cell diagram: \(\text{Zn(s)} \mid \text{Zn}^{2+}(\text{aq}) \parallel \text{Cu}^{2+}(\text{aq}) \mid \text{Cu(s)}\) Explain how the cell diagram represents the oxidation and reduction processes occurring at each electrode.

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Explain that electrochemical cells, including galvanic and electrolytic cells, consist of oxidation and reduction half-reactions connected via an external circuit that allows electrons to move from the anode (oxidation reaction) to the cathode (reduction reaction).
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Explain that oxidation can be modelled as the loss of electrons from a chemical species, and reduction can be modelled as the gain of electrons by a chemical species; these processes can be represented using balanced half-equations and redox equations (acidic conditions only).
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