Voltaic Cells (Section)A voltaic cell similar to that shown in is constructed. One half-ce...

Voltaic Cells (Section)

A voltaic cell similar to that shown in is constructed. One half-cell consists of an aluminum strip placed in a solution of A1(NO3)3, and the other has a nickel strip placed in a solution of NiSO4. The overall cell reaction is

How is electrical balance maintained in the left beaker as Zn2+ are formed at the anode?

Figure A voltaic cell that uses a salt bridge to complete the electrical circuit.

2 Al(s) + 3 Ni2+(aq)→2 Al3+(aq) + 3 Ni(s)

(a) What is being oxidized, and what is being reduced? (b) Write the half-reactions that occur in the two half-cells. (c) Which electrode is the anode, and which is the cathode? (d) Indicate the signs of the electrodes. (e) Do electrons flow from the aluminium electrode to the nickel electrode or from the nickel to the aluminum? (f) In which directions do the cations and anions migrate through the solution? Assume the Al is not coated with its oxide.