During electroplating

CHEMISTRY · Subjective · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

During electroplating, a cell operates at

3.0\,\text{A}

for the first

10\,\text{min}

and at

5.0\,\text{A}

for the next

8\,\text{min}

. The current is then reduced to

2.0\,\text{A}

until a total of

2.50\,\text{g}

of nickel has been deposited. Determine the additional time, in minutes, that the cell must run at

2.0\,\text{A}

to reach the target mass (assume

100\%

current efficiency).