Examine the Following Half-Reactions and Select the Weakest Reducing Agent

question 73

Multiple Choice

Examine the following half-reactions and select the weakest reducing agent among the substances. Cr(OH) ₃(s) + 3e^-
Cr(s) + 3OH^-(aq) E° = -1.48 V
SnO₂(s) + 2H₂O(l) + 4e^-
Sn(s) + 4OH^-(aq) E° = -0.945 V
MnO₂(s) + 4H⁺(aq) + 2e^-
Mn²⁺(aq) + 2H₂O(l) E° = 1.224 V
Hg₂SO₄(s) + 2e^-
2Hg(l) + SO₄^2-(aq) E° = 0.613 V

• A) Cr(s)
• B) Sn(s)
• C) Mn²⁺(aq)
• D) Hg(l)
• E) OH^-(aq)

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