salt bridge
Cr(s) electrode
Ag(s) electrode
1.0 M Cr3+(aq)
1.0 M Ag+(aq)
A electrolytic cell similar to that shown in the figure above is constructed. The electronic device shown at the top of the figure is a power supply. One electrode compartment consists of a silver strip placed in a 1.0 M AgNO3 solution, and the other has a chromium strip placed in a 1.0 M CrCl3 solution. The overall cell reaction is:
Cr3+(aq) + 3 Ag(s) → Cr(s) + 3 Ag+(aq)
Figure out which electrode is the anode, which is the cathode, the signs on these electrodes, the direction in which the electrons flow through the power supply, and the direction in which cations and anions migrate through the salt bridge and solutions. Use this work to pick the statement from below which is true.
a) Anions migrate from the salt bridge to the 1.0 M CrCl3 solution.
b) Cations migrate from the salt bridge to the 1.0 M AgNO3 solution.
c) Electrons flow from the chromium electrode to the silver electrode through the power supply.
d) The chromium electrode is the anode and the silver electrode is the cathode.
e) The silver electrode is positive and the chromium electrode is negative.