Question

which reaction takes place in electrochemical cell?

Answer 1

in both kinds of electrochemical cells, the anode is the electrode at which the oxidation half-reaction occurs, and the cathode is the electrode at which the reduction half-reaction occurs

Answer 2

Answer:

The reaction that takes place in an electro-chemical cell is the Redox reaction, a type of reversible reaction combining both oxidation and reduction reactions.

Explanation:

• An electrochemical cell undergoes spontaneous redox reaction through its conducting electrodes to release energy in order to produce an electric current.
• The oxidation reaction takes place through the anode and the reduction through the cathode.

In a regular voltaic cell constructed with zinc and copper electrodes, the redox reaction will take place in the following way:

Zinc electrode (anode): $\mathrm{Zn}(\mathrm{S}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+2 \mathrm{e}$

Copper electrode (cathode):$=\mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \mathrm{Cu}(\mathrm{s})$

• The two electrons released by oxidation of zinc in zinc electrode moves to cathode and reduces copper to copper metal at the cathode.
• The salt bridge regulates the reactions, where the anode loses its zinc and cathode gains copper. This electrolysis or chemical reaction is done with electrical energy.