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The standard electrode potential of the Standard Hydrogen Electrode (SHE) is defined as:
A$+1.10$ V (the Daniell cell value)
B$0$ V exactly (the universal reference)
C$+0.34$ V (the Cu electrode value)
D$-0.76$ V (the Zn electrode value)
Answer & Solution
Correct answer: B. $0$ V exactly (the universal reference)
SHE is the UNIVERSAL REFERENCE with E° defined as 0 V exactly. All other electrode potentials are measured relative to SHE. Cu/Cu²⁺ = +0.34 V; Zn/Zn²⁺ = −0.76 V.
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