Ask Question
16 November, 03:17

What is the voltage of an electrolytic cell with copper and magnesium

electrodes?

A. 2.71 V

B. - 2.71 V

C. 2.03 V

D. - 2.03 V

+3
Answers (1)
  1. 16 November, 03:29
    0
    A. 2.71 V

    Explanation:

    The standard reduction potential, E° of the metals are as follows:

    Mg²⁺ + 2e⁻ ⇌ Mg; E° = - 2.372

    Cu²⁺ + 2e⁻ ⇌ Cu; E° = + 0.337

    Since magnesium has the the lower E°, it will serve as the anode in the electrolytic cell while copper will serve as the cathode.

    At the anode; Mg ⇌ Mg²⁺ + 2e⁻, E° = - 2.372

    At the cathode; Cu²⁺ + 2e⁻ ⇌ Cu, E° = + 0.337

    EMF of the cell = E° cathode - E° anode = 0.337 - (-2.372) = 2.71 V

    Therefore, EMF of the cell is 2.71 V
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “What is the voltage of an electrolytic cell with copper and magnesium electrodes? A. 2.71 V B. - 2.71 V C. 2.03 V D. - 2.03 V ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers