The diagram that follows represents a molecular view of a process occurring at an electrode in a voltaic cell.

(b) Is the electrode the anode or cathode?

검증된 단계별 안내

Identify the process occurring at the electrode by analyzing the molecular view. Notice that atoms are leaving the electrode surface, indicating a loss of material.

Recognize that the loss of atoms from the electrode surface suggests oxidation, as atoms are losing electrons and becoming ions.

Recall that in a voltaic cell, oxidation occurs at the anode. Therefore, the electrode where atoms are leaving must be the anode.

Confirm that the electrode is the anode by noting that oxidation (loss of electrons) is taking place, which is consistent with the behavior of an anode in a voltaic cell.

Conclude that the electrode depicted in the molecular view is the anode, as it is the site of oxidation where atoms are losing electrons and becoming ions.

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주요 개념

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Voltaic Cell

A voltaic cell, also known as a galvanic cell, is an electrochemical cell that converts chemical energy into electrical energy through spontaneous redox reactions. It consists of two electrodes, an anode and a cathode, immersed in an electrolyte solution. The flow of electrons from the anode to the cathode generates an electric current, which can be harnessed for external use.

Anode and Cathode

In a voltaic cell, the anode is the electrode where oxidation occurs, meaning it loses electrons, while the cathode is where reduction takes place, gaining electrons. The anode is typically negative in a voltaic cell, as it donates electrons to the external circuit, while the cathode is positive, attracting electrons. Understanding the roles of these electrodes is crucial for analyzing the cell's operation.

Electron Transfer

Electron transfer is a fundamental process in electrochemistry, where electrons move from one species to another during redox reactions. In the context of a voltaic cell, this transfer occurs between the anode and cathode, facilitating the flow of electric current. The diagram illustrates this movement, highlighting the importance of electron flow in generating electrical energy from chemical reactions.

The diagram that follows represents a molecular view of a process occurring at an electrode in a voltaic cell.(b) Is the electrode the anode or cathode?