Which cell will measure standard electrode potential of copper electrode?

Options

A. `Pt(s) | H_(2)(g, 0.1 bar) | H^(+) (aq, 1 M) || Cu^(2+) (aq, 1 M) | Cu`
B. `Pt(s) | H_(2) (g, 1 bar) | H^(+) (aq, 1 M) || Cu^(2+)(aq, 1 M) | Cu`
C. `Pt(s) | H_(2) (g, 1 bar)| H^(+) (aq, 1 M) || Cu^(2+) (aq, 1 M) | Cu`
D. `Pt(s) | H_(2) (g, 0.1 bar) | H^(+) (aq, 0.1 M) || Cu^(2+) (aq, 1 M) | Cu`

Answer

C

Explanation

Standard electrode potential of copper electrode can be calculated by constructing a concentration cell composed of two half cell reactions in which concentration of species on left hand and right hand side are unity. In such case cell potential is equal to standard electrode potential.
`(Pt(s) | H_(2) (g, "1 bar") || H^(+) (aq, 1M) | Cu^(2+) (aq 1M) | Cu)`