Which is not true about SHE?
Correct answer: C. One molar solution of H2SO4 is used as electrolyte
- A. Finely divided platinum black is used as electrode
- B. Temperature is kept 25°C
- C. One molar solution of H2SO4 is used as electrolyte
- D. Electrode potential of any element can be calculated by comparison method
Explanation
The Standard Hydrogen Electrode (SHE) is used as a reference electrode in electrochemistry. The conditions for SHE include a platinum electrode coated with finely divided platinum black, a temperature of 25°C, a pressure of 1 atm, and a 1M solution of H+ ions typically from HCl. The correct answer is option C, as SHE does not use 1M H2SO4 because it results in a 2M concentration of H+ ions. Options A, B, and D are true statements concerning the SHE.
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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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