Question

Chromium often is electroplated on other metals and even plastics to produce a shiny metallic appearance. How many grams of chromium would plate out from a solution of Cr(NO3)3 when 10.0 amps of current are passed through the electrolytic cell for 8.45 hours? Answer: Check

Answer 1

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Reaction for Plating is as follows & Cat3 + 30 la then. Mole Ratio - 1 mole (r 3 mole of e- Charge eised - Current & Time - 10 A* 8.45X60X60 sec = 304, 200 c moles of è produced = charge used - 304200 c 96500 Imole e - 3.1523316062 i then moles of Cor plated = 1 x 3.1523316062 mole = 1.0507772021 mole. Mall of (r plate = 1.0507772021, S2 Imole - 54.64 grams So, Chromium would plate out = [54. 64 grams)