Answered

Chromium plating is applied by electrolysis to objects suspended in a dichromate solution, according to the following (unbalanced) half reaction :
Cr₂O₇²⁻(aq)+e⁻+H⁺(aq)→Cr(s)+H₂O(l)
How many hours would it take to apply a chromium plating of thickness 2.0×10⁻² mm to a car bumper of surface area 0.25m² in an electrolysis cell carrying a current of 75.0 A ?
A. 3.0h
B. 2.2h
C. 1.5h
D. 0.25h



Answer :

Other Questions