Question 1
What type of compound can form a layer of protection against corrosion?
Question 2
A cell is set up with copper and lead electrodes in contact with CuSO4(aq) and Pb(NO3)2(aq), respectively, at 25°C. The standard reduction potentials are:
Pb2+ + 2e–→ Pb E° = –0.13 V
Cu2+ + 2e–→ Cu E° = +0.34 V
If the Pb2+ and Cu2+ are each 1.0 M, the potential of the cell, in volts, is:
◦
0.47 V◦
0.92 V◦
0.22 V◦
0.58 V◦
None of these are correct.