Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge.
- a Fe electrode in 1.0 M FeCl₂ solution
- a Sn electrode in 1.0 M Sn(NO₃) ₂ solution
When the cell is running spontaneously, which choice includes only true statements and no false ones

Question

Quizplus · Accepted Answer

In an electrochemical cell, the cathode is where reduction occurs, and the anode is where oxidation occurs. The electrode that gains mass is the cathode because metal ions in solution are reduced and deposited onto the electrode. Given that the cell runs spontaneously, the standard electrode potentials suggest that iron (Fe) would be oxidized (lose electrons) and tin (Sn) would be reduced (gain electrons). Therefore, the tin electrode is the cathode, gains mass, and the iron electrode is the anode, loses mass.

Consider an Electrochemical Cell Constructed from the Following Half Cells