A piece of silver ornament was to be plated with gold using solution

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

A piece of silver ornament was to be plated with gold using AuCl3\text{AuCl}_3 solution. If a current of 2 A was used for 10 minutes for this electroplating to have a coating of thickness 0.02 mm what is the surface area of the ornament given the density of gold is 19.7 g/cc. Atomic mass of Au = 197 u. (a) 20.72 cm220.72\,\text{cm}^2 (b) 124.35 cm2124.35\,\text{cm}^2 (c) 82.9 cm282.9\,\text{cm}^2 (d) 41.45 cm241.45\,\text{cm}^2

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