1. The problem statement, all variables and given/known data The electrochemical cell: SCE // CrO4 2- (x M) / Ag2CrO4 (s) / Ag (s) is used for the determination of CrO4 2- . The standard reduction potential for the reaction: Ag2CrO4 (s) + e = 2 Ag + CrO42- is +0.446 V vs. NHE. (b) Which of the following ions would be expected to interfere with CrO4 2- quantitation if added to the analyte solution: NO3 - , Br - , S 2- , K + , Pb 2+ 3. To solve this I guess I need to understand how the half cell is working. So I think the electrons coming from the salt bridge react with Ag2CrO4 (s) at the surface of the Ag electrode to produce a deposit of Ag on the metal and CrO42- which stays in solution. However I am not sure where the interference will take place. I am not sure if adding K and Pb cations will just take in electrons and reduce current or if some of the anions interfere at the electrode surface. Any help would be greatly appreciated!