Two Copper strips were used to determine the effect of electrolysis time and immersed in 3.080g of Cu (NO3)2dissolved in 25mL of DI water. The weight of one copper strip act as an anode is taken before the reaction and after the reaction to calculate the change in mass due to different applied current. The current is applied for 5mins for every reptation.
Two Copper strips were used to determine the effect of
|
Current (A) |
0.5 |
1.0 |
1.5 |
2.0 |
|
Initial mass of strip (mg) |
2941 |
3390 |
2.893 |
2.738 |
|
Final mass of strip (mg) |
2893 |
3297 |
2.738 |
2.573 |
|
Mass change Dm (mg) |
48 |
93 |
155 |
165 |
The theoretical mass of copper deposited on supplying different current:
Michael Faraday equation:
Q = I x t = nFN
Calculate the theoretical mass that should be obtained at each applied current and Compares the theoretical mass (mg) of copper and the actual mass deposited (obtained from the electrolysis, ∆m) by calculating the %error at different times. Briefly discuss the observed results. Is there any trend observed?
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