V.V. Losev and A.P. Pchel’nikov (Soviet Electrochem. 6, 34 (1970)) obtained the following current–voltage data for an indium anode relative to a standard hydrogen electrode at 293 K:
\(\begin{array}{lllll}-E^{\prime} / \mathrm{V} & 0.388 & 0.365 & 0.350 & 0.335 \\j /\left(\mathrm{A} \mathrm{m}^{-2}\right) & 0 & 0.590 & 1.438 & 3.507\end{array}\)
Use these data to calculate the transfer coefficient and the exchange-current density. What is the cathodic current density when the potential is 0.365 V? Hint: The value of \(E^{\prime}\) with j = 0 is the equilibrium potential.
Text Transcription:
-E^prime/V & 0.388 & 0.365 & 0.350 & 0.335 over j/(A m^-2) & 0 & 0.590 & 1.438 & 3.507
E^prime
Organic Chemistry (8/6-8/8 Notes) Exam 1 (Professor Anne Gordon) Wednesday’s Notes o A Brønsted-Lowry Acid is species that donate a proton o A Brønsted-Lowry (BL) Base is a species that can accept a proton o Remember Acid-Base reactions are also called Proton Transfer reactions Acidity depends on medium We’ll always think H 2 as standard, but often acids are less dissociated in organic solvents o Acids and Bases: The Lewis Definition Lewis acids are electron pair acceptors and Lewis bases are electron pair donors Brønsted acids aren’t Lewis acids b/c they can’t accept an electron pair directly (only a proton would be a Lewis acid) The Lewis definition leads to a general description of many reactions patterns but there is no scale of strength as in Brønsted definition of pK a Lewis acid/base def: Lewis acids ACCEPTS a pair of electrons Lewis bases DONATES a pair of electrons Acids under the BL def. are also acids under the Lewis def. Bases under the BL def. are also bases under the Lewis def. This reaction fits both definitions Since a Lewis acid is a species that accepts electrons, it is termed an electrophile (lov
