Cadmium is found in small quantities wherever zinc is found. Unlike zinc, which in trace amounts is an essential element, cadmium is an environmental poison. To determine cadmium ion concentrations by electrical measurements, we need the standard electrode potential for the Cd²⁺/Cd electrode. The voltage of the following voltaic cell is measured.

What is the standard electrode potential for the Cd²⁺/Cd electrode?

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Cd(s) Cd²+ (1 M)||Cu²+ (1 M) Cu(s) Ecell 0.743 V