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Question:

CHEMISTRY: Which is the anode and which is the cathode (Aluminum or Silver)?

Which is the anode and which is the cathode (Aluminum or Silver)? And indicate the polarity of each electrode (positive or negative).Al(s) + 3 Ag+ (aq) -gt; Al+3 (aq) + 3 Ag (s)Please explain

Answer:

See very simple all you have to know is that at cathode reduction takes place and at anode oxidation takes place Reduction is gain of electrons Oxidation is loss of electrons Here, Al - Al(3+) + 3e (oxidation-loss of electrons) Ag(+) + e - Ag.(reduction-gain of electrons) Therefore here Silver-the cathode (polarity positive by convention) Aluminum-the anode(polarity negative by convention) Cell can be represented as Al / Al(3+) || Ag(+) / Ag

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