A jeweler wishes to electroplate a thin layer of silver onto a decorative pin
CHEMISTRY · Multi-part · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry
Problem
A jeweler wishes to electroplate a thin layer of silver onto a decorative pin. The plating bath contains Ag⁺ ions. A constant current of 0.350 A is passed through the cell for 25.0 min. After rinsing and drying, the additional mass of the pin is found to be 0.160 g. Assume the current remains steady for the entire time and that no other redox processes occur at the cathode.
(a) Calculate the theoretical mass of silver that should have been deposited on the pin during the 25.0 min plating period. Express your answer with the correct units.
(b) Determine the percent yield of silver deposition for this experiment.
(c) The jeweler requires at least 90.0 % yield. If the current remains at 0.350 A, calculate the additional time (in minutes) the current must be applied to achieve the required yield based on the original theoretical prediction.