Which statement is true about oxidation and reduction in an electrochemical cell?
(1) Both occur at the anode.
(2) Both occur at the cathode.
(3) Oxidation occurs at the anode and reduction occurs at the cathode.
(4) Oxidation occurs at the cathode and reduction occurs at the anode.

Question

Chemistry

Answered

Which statement is true about oxidation and reduction in an electrochemical cell?
(1) Both occur at the anode.
(2) Both occur at the cathode.
(3) Oxidation occurs at the anode and reduction occurs at the cathode.
(4) Oxidation occurs at the cathode and reduction occurs at the anode.

Sagot :

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Lulu1991id Lulu1991id · Answer 1

Lulu1991id Lulu1991id

The answer is (3) oxidation occurs at the anode and reduction occurs at the cathode. That's because the oxidation reaction will loss electrons and reduction reaction will gain electrons.

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BarrettArcherid BarrettArcherid · Answer 2

Answer : The correct option is, (3) Oxidation occurs at the anode and reduction occurs at the cathode.

Explanation :

Electrochemical cell : It is a type of device which is used to convert the chemical energy into electrical energy during the redox reaction.

In the electrochemical cell, there are two electrodes. The electrode on which the oxidation takes place is called the anode (or negative pole) and the electrode on which the reduction takes place is called the cathode (or positive pole). This cell is connected by the salt bridge.

In the external circuit, the electrons flow from the anode (negative pole) to cathode (positive pole) through the voltmeter.

In the inner circuit, the ions flow through the salt bridge.

Hence, the correct option is, (3) Oxidation occurs at the anode and reduction occurs at the cathode.