1.)

The following half-reactions take place in an acidic solution:

2Hg(l) →Hg2+2(aq) + 2e− 2Hg(l) →Hg22+(aq) + 2e-

PbO2(s) + 4H+(aq) + 2e− → Pb2+(aq) + 2H2O(l)PbO2(s) + 4H+(aq) + 2e- → Pb2+(aq) + 2H2O(l)

Question 1 options:

a)

H+H+

b)

HgHg

c)

Hg2+2Hg22+

d)

PbO2