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Homework Statement
Calculate the normal potential at 25 °C for the reaction:
HA(aq) + e- → A-(aq) + 1/2H2(g)
if the dissociation constant of HA is equal to 3.3*10-4
Homework Equations
ΔG° = -RTlnK ⇔ -ΔG°/nF = RT/(nF)lnK ⇔ E° = RT/(nF)lnK
The Attempt at a Solution
Just plugging in the numbers gives the answer E°=-0.206V
However, the answer key of the textbook disagrees on the sign... Am I overlooking something or is it just a typo? I can't imagine what my mistake could be...