In a standard galvanic cell operating at 25 °C, what occurs at the anode?
Answer and explanation
Correct answer: D. Oxidation, where electrons are released into the external circuit
By convention in all electrochemical cells (both galvanic and electrolytic), oxidation (loss of electrons) occurs at the anode (mnemonic: An Ox), and reduction (gain of electrons) occurs at the cathode (mnemonic: Red Cat). In a galvanic cell, electrons flow spontaneously through the external circuit from the negative anode to the positive cathode.
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