± Introduction to Electroplating To relate current, time, charge, and mass for e
ID: 511445 • Letter: #
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± Introduction to Electroplating
To relate current, time, charge, and mass for electroplating calculations, Electroplating is a form of electrolysis in which a metal is deposited on the surface of another metal. To quantify electrolysis, use the following relationships. Electric current is measured in amperes (A), which expresses the amount of charge, in coulombs (C), that flows per second (s): 1A = 1 C/s Another unit of charge is the faraday (F), which is equal to a mole of electrons and is related to charge in coulombs as follows: 1 F = 1 mol e^- = 96, 500 C Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn^2(aq) + 2e rightarrow Zn(s) For a large batch of nails, a manufacturer needs to plate a total zinc mass of 3.10kg on the surface to get adequate coverage. How many moles of zinc are in 3.10 kg of zinc? Express your answer to three significant figures and include the appropriate units.Explanation / Answer
Zn weight = 3.10 kg = 3.10 x 1000 = 3100g
Zn molecular weight = 65.38 g / mol
mole = weight / moelcuar weight
Zn moles = Zn weight / Zn molecular weight
= 3100 / 65.38
= 47.4
Zn moles = 47.4
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