Given:
W3+(aq) + 3e-
W(s) ; E° = 2.72 V
Pb2+(aq) + 2e-
Pb(s) ; E° = -0.13 V
Ni2+(aq) + 2e-
Ni(s) ; E° = -0.23 V
Cd2+(aq) + 2e-
Cd(s) ; E° = -0.40 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
Under standard-state conditions,which of the following metals will reduce W3+ to W but will not reduce Ni2+ to Ni?
A) Cd
B) Pb
C) Al
D) Zn
E) Mg
Correct Answer:
Verified
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Pb2+(aq)+ 2e- ![]()
Hg2+(aq)+ 2e- ![]()
Mg2+(aq)+ 2e-
Pb2+(aq)+ 2e- ![]()
Zn2+(aq)+ 2e- ![]()
Zn2+(aq)+ 2e- ![]()
2Cr(s)+ 6H+(aq)→ 2Cr3+(aq)+