The diagram shows a galvanic cell. The current will flow from:
Correct answer: A. Hydrogen electrode to copper electrode
- A. Hydrogen electrode to copper electrode
- B. Copper electrode to hydrogen electrode
- C. Hydrogen electrode to HCl solution
- D. CuSO4 solution to hydrogen electrode
Explanation
The reduction potential of copper is greater than that of hydrogen so in that case, the copper electrode will act as a cathode and S.H.E will act as an anode so electrons will flow from S.H.E to the copper electrode Key point: S.H.E. acts as a cathode (gets reduced) when attached to an electrode of metal except for Cu, Ag,AU, and Pt.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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