Question Video: Identifying the Anode or Cathode Based on an Experimental Setup Involving Mobile Ions Chemistry • 10th Grade

In the diagram, which electrode is on the right? [A] The anode, as it is attracting a cation [B] The cathode, as it is attracting a cation [C] The anode, as it is attracting an anion [D] The cathode, as it is attracting an anion

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Video Transcript

In the diagram shown, which electrode is on the right? (A) The anode, as it is attracting a cation. (B) The cathode, as it is attracting a cation. (C) The anode, as it is attracting an anion. (D) The cathode, as it is attracting an anion.

In this diagram, we see two electrodes that have been placed into the same beaker. This is an example of an electrolytic cell, an electrochemical cell that uses electrical energy to drive a nonspontaneous chemical reaction. Electrolytic cells are used for electrolysis, a type of process where electrical current is passed through a liquid, which causes the substances inside to decompose.

To sustain an electrolytic reaction, we need to be able to continuously get power from a direct current power source, an electrical cell, or a battery. In this notation, the longer line represents the positive terminal of an electrical cell and the shorter line represents the negative terminal. So the electrode on the right is negative and the electrode on the left is positive.

In the cell, positively charged ions called cations are attracted to the negative electrode, which we call the cathode. Negatively charged ions called anions are attracted to the positive electrode, which we call the anode. So, in this diagram, the anode is on the left and the cathode is on the right.

In the diagram, we can see that positively charged cations are being drawn towards the cathode and negatively charged anions are being drawn towards the anode. In conclusion, the electrode that is on the right is the cathode, as it is attracting a cation, answer choice (B).

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