Chromium plating is applied by electrolysis to objects suspended in a dichlromate solution ,
Channel: Doubtnut
Date: 2020-07-12

Chromium plating is applied by electrolysis to objects suspended in a dichlromate solution , according to following `(` unbalanced `)` hald reaction `:`  `Cr_(2)O_(7)^(2-)(aq) +e^(-) +H^(o+)(aq) rarr Cr(s)+H_(2)O(l)`  How many hours would it take to apply a chromium plating of thickness `2.0xx10^(-2)mm` to a car bumper of suface area `0.25m^(2)` in an electrolysis cell carrying a current of `75.0A?`  `[` Density of chromium is `7.19g cm^(-3)]`