Electrons flow from:
Correct answer: D. Anode to cathode
- A. None of these
- B. Both of these
- C. Cathode to anode
- D. Anode to cathode
Explanation
The direction of electrons in the external circuit is from the anode to the cathode. The direction of ions inside the cell is from cathode to anode. Electrons flow from anode to cathode (this is always the case). For an electrolytic cell, however, this flow is not spontaneous but must be driven by an external power source. In an electrolytic cell, the anode has the "+" sign.
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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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