Apentix/AP Chemistry/Unit 9: Applications of Thermodynamics/Question
AP Chemistryeasymcq1 pt

An iron spoon is electroplated with silver from a solution of Ag⁺ ions. Where is the spoon placed, and what happens there?

A.At the cathode, where Ag⁺ ions are reduced onto its surface
B.At the anode, where the spoon itself dissolves into the solution
C.In the salt bridge, where it balances migrating ions
D.Anywhere in the solution, because silver deposits spontaneously onto iron

Explanation

Core Concept

Plating means reducing dissolved metal ions to atoms on the object. Reduction occurs at the cathode, so the spoon is connected to the negative terminal and hosts Ag⁺(aq) + e⁻ → Ag(s), coating its surface with silver. A silver anode across from it oxidizes at the matching rate, replenishing the ion supply.

Correct Answer

AAt the cathode, where Ag⁺ ions are reduced onto its surface

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