We’re being asked which of the given species is the strongest reducing agent. Reducing agent are the species that are being oxidized in a redox reaction. Recall the mnemonics LEO GER.
The strongest reducing agent would be the element that would be easily oxidized or easily loses an electron:
Consider the following standard reduction potentials:
Al3+ + 3e – → Al (s) E ̊red = –1.66
AgBr (s) + e – → Ag (s) + Br– E ̊red = +0.07
Sn4+ + 2e – → Sn2+ E ̊red = +0.14
Fe3+ + e – → Fe2+ E ̊red = +0.77
Which of the following substances below is the strongest reducing agent?
c) Ag (s)
e) Al (s)
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