- #1
DevonZA
- 181
- 6
A square plate has a side of 100mm. It is connected to the cathode in a copper electroplating bath and a current of 4A is passed through the bath. Neglecting the thickness of the plate, determine how long it takes to cover both sides of the plate with copper to thickness of 0.1mm
Density of copper to be 9000kg/m^3
The electrochemical equivalent of copper to be 0.330mg/C
Answer given = 227 min 16 sec
Volume = area x height
= 20 000x10^-7 X 0.23x10^-3
= 4x10^-7
Mass = volume x density
= 4x10^-7 X 9000kg/m^3
= 3.6x10^-3kg = 3600mg
m = zIt
t = m/zI
= 3600/(0.330)(4)
= 43636.36364s = 727 min and 16 sec
I am quite confident in my answer but it is way off from the supplied answer - unless that was a typo.
Any input would be appreciated.
Thanks,
Devon
Density of copper to be 9000kg/m^3
The electrochemical equivalent of copper to be 0.330mg/C
Answer given = 227 min 16 sec
Volume = area x height
= 20 000x10^-7 X 0.23x10^-3
= 4x10^-7
Mass = volume x density
= 4x10^-7 X 9000kg/m^3
= 3.6x10^-3kg = 3600mg
m = zIt
t = m/zI
= 3600/(0.330)(4)
= 43636.36364s = 727 min and 16 sec
I am quite confident in my answer but it is way off from the supplied answer - unless that was a typo.
Any input would be appreciated.
Thanks,
Devon