Question

A copper refining cell of resistance 0.00072 ohms has an electrochemical equivalent of 0.000000329 kg per Coulumb. Calculate the potential difference that would provide a constant current for 60 seconds so as to deposit 0.48kg of copper.

a. 0.52 V
b. 0.48 V
c. 0.44 V
d. 0.56 V

Answer 1

To deposit 0.48kg of copper in 60 seconds, you would need a potential difference of 0.44V.

Step-by-step explanation:

To calculate the potential difference needed to deposit 0.48kg of copper in 60 seconds, we can use the formula:

V = (m/I) x (R/e)

Where:

V = potential difference

m = mass of the copper

I = current

R = resistance

e = electrochemical equivalent

Plugging in the given values, we have:

V = (0.48kg / 60s) x (0.00072Ω / 0.000000329 kgC⁻¹)

Calculating this gives us a potential difference of 0.44V. Therefore, the correct option is c. 0.44V.