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

question 88

Multiple Choice

Examine the following half-reactions and select the strongest reducing agent among the species listed. PbI₂(s) + 2e_-
Pb(s) + 2I^-(aq) E° = -0.365 V
Ca²⁺(aq) + 2e^-
Ca(s) E° = -2.868 V
Pt²⁺(aq) + 2e^-
Pt(s) E° = 1.18 V
Br₂(l) + 2e^-
2Br^-(aq) E° = 1.066 V

• A) Pb(s)
• B) Ca(s)
• C) Pt(s)
• D) Br^-(aq)
• E) Pt²⁺(aq)

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Definitions:

Shield Volcano

A shield volcano is a type of volcano with broad, gently sloping sides and nearly circular base, formed by the eruption of low-viscosity lava that can flow a great distance from the vent.

Scoria Cone

A small volcanic cone made up of basaltic lava fragments and ash, typically created during explosive eruptions.

Caldera

A vast volcanic hollow created by a significant explosion that results in the collapse of the volcano's opening.

Pyroclastic Deposits

Accumulations of volcanic materials, such as ash, tephra, and lava bombs, ejected explosively from a volcano.