Answer: The overall equation will be [tex]Co(s)+2Ag^+(aq)\rightarrow Co^{2+}(aq)+Ag(s)[/tex]
Explanation:
The representation is given by writing the anode on left hand side followed by its ion with its molar concentration. It is followed by a salt bridge. Then the cathodic ion with its molar concentration is written and then the cathode.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Anode : [tex]Co(s)\rightarrow Co^{2+}(aq)+2e^{-}[/tex]
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
Cathode : [tex]Ag^+(aq)+e^{-1}\rightarrow Ag(s)[/tex] [tex]\times 2[/tex]
The number of electrons lost must be equal to the number of electrons gained , thus overall equation will be :
[tex]Co(s)+2Ag^+(aq)\rightarrow Co^{2+}(aq)+Ag(s)[/tex]
