Use the standard reduction potentials below to identify the pair of half-reactions…

CHEMISTRY · Subjective · A Level · Chemistry · Electrode potentials · Electrode potentials

Problem

Use the standard reduction potentials below to identify the pair of half-reactions that will generate the largest positive standard cell potential when combined into a galvanic cell, and state the numerical value of that Ecell∘E^\circ_{\text{cell}}. (1) Cu2+^{2+} + 2e⁻ → Cu(s) E∘=+0.34 VE^\circ = +0.34\,\text{V} (2) Ag⁺ + e⁻ → Ag(s) E∘=+0.80 VE^\circ = +0.80\,\text{V} (3) Zn2+^{2+} + 2e⁻ → Zn(s) E∘=−0.76 VE^\circ = -0.76\,\text{V}

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