Suppose that you have an iron rod that requires copper coating. You have calculated that you need to deposit 4.00 g of copper to achieve an adequate coating. If your electrolysis cell (using Cu 2+ )runs at 1.5 A, how long must you operate the cell to obtain the desired coating?

Question

Quizplus · Accepted Answer

To calculate the time, use the formula: time (s) = (mass of Cu * F * n) / (I * M), where F is Faraday's constant (96485 C/mol), n is the number of electrons (2 for Cu²⁺), I is current (1.5 A), and M is molar mass of Cu (63.55 g/mol). Solving gives approximately 8100 seconds, which is about 2 hours and 15 minutes.

Suppose That You Have an Iron Rod That Requires Copper