Question

The half cell reaction, with its standard reduction potentials are:
(i) Pb2+ + 2e- → Pb (E° = -0.13 V)
(ii) Ag+ + e- → Ag (E° = +0.80 V)
Which of the following reactions will occur
(a) Pb2+ + 2Ag → 2Ag+ + Pb
(b) Pb2+ + H2 → 2H+ + Pb
(c) 2H+ + 2Ag → 2Ag+ + H2
(d) 2Ag+ + Pb → Pb+ + 2Ag​

Answer 1

Explanation:

Zn + Cu2+ → Zn2+ + Cu

If you were to mix zinc metal and copper ions in a container, this reaction would proceed by itself; we say that this reaction is spontaneous.