Consider a Galvanic cell constructed from the following half cells, linked by a KCl salt bridge: an Fe electrode in 1.0 M FeCl2 solution and 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?a) The iron electrode gains mass and the iron electrode is the cathode. b) The tin electrode gains mass and the tin electrode is the cathode. c) The iron electrode gains mass and the iron electrode is the anode. d) The iron electrode loses mass and the iron electrode is the cathode. e) The tin electrode loses mass and the tin electrode is the cathode.

b) The tin electrode gains mass and the tin electrode is the cathode.

Explanation:

Iron(ii) ion, Fe⁺ is higher than tin(ii) ion, Sn²⁺ in the electrochemical series, therefore, tin (ii) iron is preferentially discharged to iron(ii) ion in aqueous solutions.

Also, since oxidation occurs at the anode and reduction occurs at the cathode, in the Galvanic cell constructed from the following half cells, linked by a KCl salt bridge: an Fe electrode in 1.0 M FeCl2 solution and a Sn electrode in 1.0 M Sn(NO3)2 solution, the Fe electrode serves as the anode, while the Sn electrode serves as the cathode.

The Sn²⁺ ions in the aqueous solution of Sn(NO₃)₂ will accept electrons from the Sn cathode and become deposited as neutral Sn atoms. At the anode, neutral Fe atoms will dissolve into the FeCl₂ solution depositing their electrons at the anode, thereby losing mass.

Therefore the correct option is: (b) The tin electrode gains mass and the tin electrode is the cathode.

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