Copper is electrodeposited on copper from an aqueous solution containing 0.5×10⁻³ mol/cm³ CuSO₄. Transport controls the rate; mass-transfer coefficient is 10⁻⁴ cm/s and F=96500 C per gram equivalent. Find limiting current density in mA/cm².
For Cu²⁺+2e⁻→Cu, the electron number is 2. Limiting flux is kC, hence $i_L=2FkC=2(96500)(10^{-4})(0.5\times10^{-3})=0.00965$ A/cm² =9.65 mA/cm². Thus B. The factor two is essential.
More Chemical and electrochemical kinetics questions
GATE 2025 MT Q56– Copper is electrodeposited from a CuSO 4 bath onto a stainless-steel cathode of total…
GATE 2025 MT Q63– The reaction A B follows first-order kinetics. At a given temperature, 20% conversion…
GATE 2024 MT Q58– A nonporous spherical Fe 2O 3 particle of initial radius 510-2 m is topochemically reduced…
GATE 2023 MT Q34– A reaction’s rate constant at 400 K is three times that at 300 K. Its activation energy is…
GATE 2021 MT Q21– For a zero-order chemical reaction, which statement is FALSE?
GATE 2020 MT Q54– A metal oxidizes at 1200 K with parabolic rate constant 310-6\ g2\,cm-4\,s-1. How long to…