A galvanic cell is constructed using a Pt|Fe^ 3+ (aq),Fe^ 2+ (aq) half-cell (all…
CHEMISTRY · Single correct · A Level · Chemistry · Electrode potentials · Electrode potentials
Problem
A galvanic cell is constructed using a Pt|Fe^{3+}(aq),Fe^{2+}(aq) half-cell (all species 1.0 M) and a Pt|Ag^{+}(aq),Ag(s) half-cell (Ag^{+} 1.0 M). The half-cells are joined by a salt bridge containing KCl(aq). After the cell has operated for several minutes at constant temperature, which change will most likely be observed in the silver half-cell?
(a) The concentration of Cl^{−} decreases as these anions migrate out of the compartment.
(b) The mass of the silver electrode decreases as Ag atoms are oxidized to Ag+.
(c) The concentration of K^{+} increases because these cations migrate into the compartment.
(d) The concentration of Ag^{+} increases because reduction occurs at the anode.