Difference cell cell emf standard reduction potential

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: um work that an electron can do is equal to its charge times the difference in electrical potential though which it falls. difference Cell Cell EMF ° Standard reduction potential ( Ered ) : the voltage associated with a reduction reduction reaction at an electrode when all solutes present at 1 M solutes and all gases at 1 atm. gases atm ° Standard potential ( Ered ) : a measure electronmeasure of electron-pulling power of a single electrode ° Zn 2+ (aq) + 2e → Zn( s ) EZn2+ / Zn = −0.76V ° Cu 2+ (aq) + 2e → Cu ( s ) ECu 2+ / Cu = +0.34V ° ° ° Ecell = Ecathode − Eanode In a voltaic cell, the electrodes pulling in opposite directions, so the cell overall pulling power of a cell, the cell standard EMF, is the difference of the standard potential of two electrodes. Standard Electrode Potentials The reference half reaction: the reduction of H+(aq) to the H2 (g) under standard conditions. standard Reduction Reaction 2 H + (aq,1M ) + 2e → H 2 ( g ,1atm) Standard condition ° Ered ( H + / H 2 ) = 0V Standard hydrogen electrode (SHE) redox couple Standard Electrode Potentials Standard Reduction Potentials (E°red ) is measured relative to the is standard hydrogen electrode (SHE). The standard emf (E° ) of the cell cell ° ° ° Ecell = Ecathode − Eanode ° Ecell = 0.76V (-)Zn (s) | Zn2+ (1 M)...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern