Standard Hydrogen Electrode - Construction

Construction

The scheme of the standard hydrogen electrode:

  1. platinized platinum electrode
  2. hydrogen blow
  3. solution of the acid with activity of H+ = 1 mol dm−3
  4. hydroseal for prevention of the oxygen interference
  5. reservoir through which the second half-element of the galvanic cell should be attached. The connection can be direct, through a narrow tube to reduce mixing, or through a salt bridge, depending on the other electrode and solution. This creates an ionically conductive path to the working electrode of interest.

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