Question

Two half cells have reduction potentials $-0.76 \, V$ and $- \, 0.13 \, V$ respectively. A galvanic cell is made from these two half cells. Which of the following statements is correct?

• A. Electrode of half-cell potential $-0.76 \, V$ acts as cathode
• B. Electrode of half-cell potential $-0.76 \, V$ acts as anode
• C. Electrode of half-cell potential $-0.13 \, V$ acts as anode
• D. Electrode of half-cell potential $- \, 0.76 \, V$ acts as positive electrode and $-0.13 \, V$ as negative electrode

Answer 1

Answer: (B)

According to the electrochemical series, the electrode with high reduction potential will act as a cathode, and the electrode with more negative reduction potential acts as the anode.