Given:
Pb2+(aq) + 2e-
Pb(s) ; E° = -0.13 V
Zn2+(aq) + 2e-
Zn(s) ; E° = -0.76 V
Al3+(aq) + 3e-
Al(s) ; E° = -1.66 V
Mg2+(aq) + 2e-
Mg(s) ; E° = -2.38 V
V2+(aq) + 2e-
V(s) ; E° = -1.18 V
Cu2+(aq) + 2e-
Cu(s) ; E° = 0.34 V
Which of the following cations is capable of oxidizing Pb to Pb2+ under standard-state conditions?
A) Al3+
B) V2+
C) Cu2+
D) Mg2+
E) Zn2+
Correct Answer:
Verified
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Pb2+(aq)+ 2e- ![]()
Hg2+(aq)+ 2e- ![]()
Mg2+(aq)+ 2e-
W3+(aq)+ 3e- ![]()
Zn2+(aq)+ 2e- ![]()
Zn2+(aq)+ 2e- ![]()
2Cr(s)+ 6H+(aq)→ 2Cr3+(aq)+
Pb2+(aq)+ 2e- ![]()