Practice question
Question
What is the standard emf of a cell with the reaction Mn(s) + Hg²⁺(aq) → Mn²⁺(aq) + Hg(l) ? (Given: E°Mn²⁺/Mn = -1.18 V , E°Hg²⁺/Hg = 0.85 V )
Explanation
E°cell = E°cathode - E°anode = 0.85 - (-1.18) = 2.03 V .
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