Identify incorrect statement about standard hydrogen electrode:
Correct answer: B. its E°red is zero or less than zero
- A. It is used as a reference electrode
- B. its E°red is zero or less than zero
- C. When it is connected to zinc electrode in a galvanic cell, it act as cathode
- D. When it is connected to Cu electrode in a galvanic cell, it act as anode
Explanation
The standard reduction potential (E°red) of the standard hydrogen electrode is defined to be exactly 0 volts. It cannot be less than zero. It is a convention chosen for convenience, allowing scientists to measure and compare the reduction potentials of other half-reactions relative to the hydrogen electrode.
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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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