A standard galvanic cell is constructed in which a Sn2 Hint: Refer to a table of

Question

A standard galvanic cell is constructed in which a Sn2 Hint: Refer to a table of standard reduction potentials. (Choose all that apply.) Sn half cell acts as the cathode. Which of the following statements are correct? As the cell runs, anions will migrate from the Sn2 Sn compartment to the other compartment The cathode reaction is Sn2+ +2e">Sn In the external circuit, electrons flow from the Sn2 Sn compartment to the other compartment. The cathode reaction is Sn-Sn2+ +2e U CI,CI. could be the other standard half cell

Explanation / Answer

At cathode of a cell reduction takes place, hence electrons are released at cathode i.e. cathode is negatively charged. Here Sn2+/Sn is the cathode, so electrons flow from the Sn2+/Sn compartment to the other compartment and anions will migrate from the Sn2+/Sn compartment to the other compartment. The reduction reaction in the Sn2+/Sn compartment is:

  Sn2++ 2e- -> Sn

Now the standard reduction potential of Cl2/Cl- (+1.36 V) is higher than that of Sn2+/Sn (-0.14 V). So in a cell constructed of these two half-cells, reduction will take place at the Cl2/Cl- half-cell, i.e. Cl2/Cl- will act as cathode.

Therefore, the correct statements are:

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