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प्रश्न
Define Reference electrode
What is a reference electrode?
उत्तर
It is an electrode whose potential is arbitrarily taken as zero or is exactly known. Standard Hydrogen Electrode (SHE), calomel electrode, silver-silver chloride electrode and glass electrode are some examples of reference electrode.
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संबंधित प्रश्न
Answer the following in brief.
It is impossible to measure the potential of a single electrode. Comment.
In construction of Standard Hydrogen Electrode, platinum acts as ______.
For hydrogen gas electrode, `"E"_("H"_2)` is calculated through to Nernst equation, where `"E"_("H"_2)^0` is always _______.
Mention difficulties in settings Standard Hydrogen Electrode.
Draw a neat and well labelled diagram of Standard Hydrogen Electrode. Also write its one application.
Calculate the potential of hydrogen electrode at 25°C:
Pt, H2 (1 atm) | H+ (0.1 M)
____________ is used as a primary reference electrode to determine the standard potentials of other electrodes.
Draw a neat, labelled diagram of a standard hydrogen electrode (SHE).
Write cell reaction and calculate the potential (EMF) of the cell Zn(s) | Zn2+(0.08 M) || Cr3+ (0.1 M) Cr(s) at 298 K.
\[\ce{E^0_{Zn} = - 0.76 V and E^0_Cr = - 0.74 V}\]
Write any two difficulties of setting SHE (Standard Hydrogen Electrode).
