Question: (a) Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the cathode of a voltaic cell. (b)

(a) Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the cathode of a voltaic cell.
(b) What is standard about the standard hydrogen electrode?
(c) What is the role of the platinum foil in a standard hydrogen electrode?

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