Question

Chromium metal can be plated out from an acidic solution containing CrO₃ according to the following equation. 

CrO₃(aq) + 6H⁺(aq) + 6e^– → Cr(s) + 3H₂O. 

(i) How many grams of chromium will be plated out by 24000 coulombs? 

(ii) How long will it take to plate out 1.5 g of chromium by using 12.5 ampere current?

Answer 1

52 gram of Cr is deposited by passing 6 × 96500 coulomb