A steel panel with a surface area of 25.0 cm^ 2 is to be coated with a 10.0 μm-thick…
CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry
Problem
A steel panel with a surface area of 25.0 cm^{2} is to be coated with a 10.0 μm-thick layer of nickel by electrolysis of an aqueous Ni^{2+} solution. The nickel layer is deposited uniformly and has a density of 8.90 g cm^{–3}. If the plating must be completed in 30.0 min, what constant current is required? (Molar mass Ni = 58.69 g mol^{–1}; assume F=9.65×104C mol−1)
(a) 0.203A
(b) 4.06A
(c) 0.406A
(d) 0.812A