Question

The reduction potential of hydrogen half cell will be negative if

Answer 1

For the reaction H+(aq)+e−→H2(g)H+(aq)+e−→H2(g),the standard potential is given by

E=−RTnFE=−RTnFln(pH2/bar)1/2([H+]/moldm−3)ln(pH2/bar)1/2([H+]/moldm−3)

E will be negative if p1/2H2/[H+]>1pH21/2/[H+]>1.

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