Electrolysis and Faraday's Law

AP Chemistry· difficulty 3/5

During operation of a Zn|Zn²⁺ || Cu²⁺|Cu galvanic cell, what happens to electrode masses?

A
$Zn anode mass decreases; Cu cathode mass increases$
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B
$Zn gains, Cu loses$
C
$Both gain mass$
D
$Both electrodes lose mass$

Explanation

Zn(s) \to Zn²⁺ + 2e⁻ at the anode (mass decreases); Cu²⁺ + 2e⁻ \to Cu(s) at the cathode (mass increases).

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AP Chemistry · Electrolysis and Faraday's Law Practice Question | Acemy