Given the short-hand notation for a Galvanic cell: Li (s) | Li+ (aq) || Cd2+ (aq

Question

Given the short-hand notation for a Galvanic cell: Li (s) | Li+ (aq) || Cd2+ (aq) | Cd (s), which one of the following equations shows the net balanced reaction taking place in the cell?

a. Li (s) + Cd (s) Li+ (aq) + Cd2+ (aq)

b. Li (s) + Li+ (aq) Cd (s) + Cd2+ (aq)

c. 2 Li (s) + Cd2+ (aq) Cd (s) + 2 Li+ (aq)

d. Li (s) + Cd2+ (aq) Cd (s) + Li+ (aq)

Which of the following statements is true in a Galvanic cell? Select all that apply.

a. The cathode is where oxidation takes place.

b. The electrons travel through the wire from the anode to the cathode.

c.   The oxidizing agent reacts at the cathode.

d.   The reduction half-reaction takes place in the cathode.

e. Anions in the salt bridge travel to the cathode.

Explanation / Answer

The net balanced equation is

2Li(s)+Cd2+(aq)---> 2Li+(aq)+Cd(s)

Therefore option (c) is correct.

At anode oxidation takes place where as at cathode reduction takes place.

So the correct statements are c and d

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