4 . The standard reduction potential of Cr3+ (aq) + 3e− → Cr (s) is −0.74 V. The standard
reduction potential of Cl 2 (g) + 2e− → 2 Cl− (aq) is 1.36 V.
Based on the information given, it must be true that:
Cl 2 is more easily oxidized than Cr3+, and Cl 2 is thus a better oxidizing agent than
Cr3+.
(A)
Cl 2 is more easily oxidized than Cr3+, and Cl 2 is thus a better reducing agent than
Cr3+.
(B)
Cl 2 is more easily reduced than Cr3+, and Cl 2 is thus a better reducing agent than
Cr3+.
(C)
Cl 2 is more easily reduced than Cr3+, and Cl 2 is thus a better oxidizing agent than
Cr3+.
(D)
5 . The standard reduction potential of Cu2+ (aq) is +0.34 V. What is the oxidation potential of
Cu (s)?
(A) +0.68 V
(B) +0.34 V
(C) −0.34 V
(D) −0.68 V
6 .
When the above half-reactions are combined in a galvanic cell, which species will be
reduced and which will be oxidized?