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Solution: Of the substances below, which is the weakest reducing agent?a. Na (s)b. K+ (aq)c. Cl2 (g)d. Br - (aq)e. Fe2+ (aq)

Problem

Of the substances below, which is the weakest reducing agent?

a. Na (s)

b. K+ (aq)

c. Cl2 (g)

d. Br (aq)

e. Fe2+ (aq)

Solution

We’re being asked which of the given species is the weakest reducing agent. The weakest reducing agent is the strongest oxidizing agent. Oxidizing agents are the species that are being reduced in a redox reaction. Recall the mnemonics LEO GER.

Lose               Gain

Electron         Electrons

Oxidation       Reduction

The weakest reducing agent (strongest oxidizing agent) would be the element that would be easily reduced or most likely to gain an electron.

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