The plating reaction is Au (aq) e-¡Au(s): Notice from the reaction that 1 mol plates out 1 mol Au(s). Use this stoichiometric relationship to determine how much time is required with an electrical current of 0.200 amp to plate out 0.400 g Au. The amp is a unit of electrical current equivalent to 1 C/s. (Hint: Recall that the charge of an electron is 1.60 * 10-19 C.) e- Au (aq) e-¡Au(s).
