Question

Which of the following describes redox in displacement plating?

A) The Metal A ion is oxidized and Metal B is reduced.
B) The Metal A ion is reduced and Metal B is oxidized.
C) Displacement plating does not involve a change in oxidation states.

Answer 1

B) The Metal A ion is reduced and Metal B is oxidized.

Step-by-step explanation:

When we think of electroplating, we often think of a set up in which there is a nonsponteanous reaction driven by the presence of a cell.

However, in displacement plating, a cell is not involved. Metals are chosen based on their respective position in the electrochemical series.

For instance, silver can be coated on copper by immersing the copper rod into a silver ion solution. The copper rod becomes oxidized. The silver ions accept electrons and become deposited on the copper rod.