In a galvanic cell, if the anode reaction is 2Ag⁺ + 2e⁻ → 2Ag, what is the cathode reaction? (2022)

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Q: In a galvanic cell, if the anode reaction is 2Ag⁺ + 2e⁻ → 2Ag, what is the cathode reaction? (2022)

Solution: The cathode reaction must be a reduction reaction, and Cu²⁺ + 2e⁻ → Cu is a common cathode reaction.

Steps: 6

Step 1: Understand that a galvanic cell has two electrodes: anode and cathode.
Step 2: Know that the anode is where oxidation occurs, and the cathode is where reduction happens.
Step 3: Identify the given anode reaction: 2Ag⁺ + 2e⁻ → 2Ag. This means silver ions (Ag⁺) are being reduced to solid silver (Ag).
Step 4: Remember that the cathode reaction must involve a different substance being reduced.
Step 5: A common cathode reaction in galvanic cells is the reduction of copper ions: Cu²⁺ + 2e⁻ → Cu.
Step 6: Conclude that the cathode reaction in this case is Cu²⁺ + 2e⁻ → Cu.