Question

Determine the standard cell potential and the cell potential under the stated conditions for the electrochemical
reactions described here. State whether each is spontaneous or nonspontaneous under each set of conditions at
298.15 K.
(a) Hg(l) + S2-(aq, 0.10 M) + 2Ag+(aq, 0.25 M) ⟶ 2Ag(s) + HgS(s)
(b) The galvanic cell made from a half-cell consisting of an aluminum electrode in 0.015 M aluminum nitrate
solution and a half-cell consisting of a nickel electrode in 0.25 M nickel(II) nitrate solution.
(c) The cell made of a half-cell in which 1.0 M aqueous bromide is oxidized to 0.11 M bromine ion and a half-cell in
which aluminum ion at 0.023 M is reduced to aluminum metal. Assume the standard reduction potential for Br2(l) is
the same as that of Br2(aq)

Answer 1

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