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Two half cells have potential -0.36  and 0.82 Volts respectively. These two are coupled to make a galvanic cell. Which of the following will be true? 

Option: 1

The electrode of half cell potential -0.36 V will act as an anode 


Option: 2

The electrode of half cell potential -0.36 V will act as a cathode 


Option: 3

The electrode of half cell potential 0.82 V will act as an anode 


Option: 4

The electrode of half cell potential -0.36 V will act as the positive terminal 


Answers (1)

best_answer

Anode -

In a galvanic cell, the half cell in which oxidation takes place is called the anode.

Electrode potentials are conventionally Reduction potentials which denote the ability of a species to get reduced. Greater the reduction potential, greater is the ability to get reduced.

Correspondingly, an electrode with a negative reduction potential has a greater tendency to get oxidised and would act as an anode.

Since electrode with potential -0.36  is more negative than the electrode with potential 0.82, therefore it will act as anode and oxidation will occur there.

Hence, Option(1) is correct

Posted by

Ritika Jonwal

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