{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture notes for Monday Dec 3 2007 CHEM135 Johnson

Lecture notes for Monday Dec 3 2007 CHEM135 Johnson -...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture notes for Monday, Dec. 3 for Exam V Dr. Johnson CHEM135 Electrochemistry We have discussed the following redox reaction before in lecture. Refer to figure in book. Cu (s) + 2 Ag + (aq) Cu 2+ (aq) + Ag (s) If we separate the half reactions into two separate beakers, we can construct a galvanic cell (also called a voltaic cell) Electrons produced Electrons consumed Oxidation Reduction Build up of cations Build up of anions As ions are build up in beaker the reaction stops. Therefore a “salt bridge” is constructed to allow ions to pass between the two solutions to keep the solutions ioncially neutral. anion flow cation flow Anode Cathode electron flow Salt Bridge Cu (s) Cu 2+ (aq) + 2e - Ag + (aq) + 1 e - Ag (s) Cu Ag Cu 2+ Ag + E o oxid. = E o reduct. =
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Shorthand notation for the cell: Cu (s) / Cu 2+ (aq, 1M)// Ag + (aq, 1 M)/ Ag (s) Anode always written first (left side) Electrodes on either end (if no solid use Pt as an inert electrode) “/” denotes a phase boundary; “//” denotes a salt bridge Satandard conditions for a standard cell is 1 M for a solution and 1 atm pressure for a gas. a galvanic cell (also called a voltaic cell) is characterized by a spontaneous redox reaction see examples in OWL
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the 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