Number of electron added on both sides of oxidation and reduction half reactions are balanced:
Correct answer: D. Before Adding two half reactions
- A. At the start of the procedure
- B. Somewhere in the middle of balancing
- C. After Adding two half reactions
- D. Before Adding two half reactions
Explanation
In electrochemistry, it is crucial to balance the number of electrons lost in the oxidation half-reaction with the number of electrons gained in the reduction half-reaction before adding the two half-reactions together. This ensures that the overall redox reaction is balanced in terms of both mass and charge. Therefore, the correct step to balance electrons is before adding the two half reactions. The other options are incorrect because balancing the electrons at any other stage would not result in a properly balanced equation.
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About Electrochemistry
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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