Chem 2B-quiz 6-022207

Chem 2B-quiz 6-022207 - Salt bridges allow the flow of ions...

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

View Full Document Right Arrow Icon
Winter 2007 Professor Thuc-Quyen Nguyen Name: Chem. 2B Quiz #6 02/23/07 1) ( 10 points ) A Ni Ni + ║Ag + Ag galvanic cell is constructed in which the standard cell voltage is 1.03 V. Calculate the free energy change at 25 ° C when 1g of silver plates out, if all concentrations remain at their standard value of 1 M throughout the process. What is the maximum electrical work done by the cell on its surroundings during this experiment? 2) ( 5 points ) What is the function of the salt bridge in the galvanic cell?
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Salt bridges allow the flow of ions between the oxidation and reduction vessels while keeping them separated. 3) (5 points) Explain why the galvanic cell below doesnt work. The net reaction is spontaneous but a little current flows through the circuit because Ag + ions are not forced to be reduced at the Ag electrode. The Ag + ions in solution can react directly at the Cd(s) surface, giving the same net reaction with no flow of electrons through the external circuit....
View Full Document

Ask a homework question - tutors are online