For a science experiment you need to electroplate zinc onto both sides of a very thin,...
For a science experiment you need to electroplate zinc onto both sides of a very thin, 1.00cm
Homework Answers
determine the number of zinc atoms in
the plating,
multiply by 2 to get the number of electrons needed, convert to
Coulombs and divide by the current.
atomic weight of zinc Wz = 65.38
g/mole
Zinc atom mass mz = Wz/(1000*Avogadro) =
1.0857E-25 kg
Zinc atom volume Vz = mz/rho = 1.5206E-29
m^3
V(plating) = 150E-9*2*0.01^2 = 2.8E-11
m^3
Natoms = V(plating)/Vz = 1.841E18
Nelectrons = 2*Natoms = 3.683E18
Total charge Q = Nelectrons*1.6022E-19 =
0.59009026 C
t = Q/I = 421.493 s = 421.5 sec appro
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For a science experiment you need to
electroplate zinc onto both sides of a very thin,...
For a science experiment you need to electroplate zinc onto both sides of a very thin,...
For a science experiment you need to electroplate zinc onto both sides of a very thin, 1.00 cm × 1.00 cm copper sheet. You want the zinc thickness to be 140 nm , and you know that the charge carriers in the ionic solution are divalent (charge 2e) zinc ions. The density of zinc is 7140 kg/m3 If the electroplating apparatus operates at 1.40 mA , how long will it take the zinc to reach the desired thickness?
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