Justify the standard hydrogen electrode can act as both anode and cathode.
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Standard hydrogen electrode consists of a platinum wire sealed in a glass tube and carrying a platinum foil at one end .
The electrode is placed in a beaker containing an aqueous solution of an acid having 1 Molar concentration of hydrogen ions. Hydrogen gas at 1 bar pressure is continuously bubbled through the solution at 298K298K.
The oxidation or reduction takes place at the Platinum foil.
The standard hydrogen electrode can act as both anode and cathode. If the standard hydrogen electrode acts as an anode:
H2(g)→2H+(aq)+2eIfH2(g)→2H+(aq)+2eIf the standard hydrogen electrode acts as a cathode: 2H+(aq)+2e−→H2(g)
The electrode is placed in a beaker containing an aqueous solution of an acid having 1 Molar concentration of hydrogen ions. Hydrogen gas at 1 bar pressure is continuously bubbled through the solution at 298K298K.
The oxidation or reduction takes place at the Platinum foil.
The standard hydrogen electrode can act as both anode and cathode. If the standard hydrogen electrode acts as an anode:
H2(g)→2H+(aq)+2eIfH2(g)→2H+(aq)+2eIf the standard hydrogen electrode acts as a cathode: 2H+(aq)+2e−→H2(g)
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Answer:
anode charge is negative and cathode charge is positive
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