Mention difficulties in settings Standard Hydrogen Electrode. - Vidyadip

Question

Mention difficulties in settings Standard Hydrogen Electrode.

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Answer

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.
It is also difficult to maintain the concentration of $H^+$ ion solution at exactly $1\ M$. The bubbling of $H_2$ gas into the solution results in the evaporation of water which changes the concentration of the solution.

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