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Question
Write any two difficulties of setting SHE (Standard Hydrogen Electrode).
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Solution
- It is difficult to obtain pure and dry hydrogen gas.
- The pressure of hydrogen gas cannot be maintained exactly at 1 atm throughout the measurement.
- The concentration of H+ ion solution cannot be exactly maintained at 1 M. Due to bubbling of gas into the solution, evaporation of water may take place. This results in changing the concentration of the solution.
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