ELECTROLYSIS-QN15
An electric steady current of 2A was passed through fused aluminum oxide. Calculate the time taken to deposit 25g of Aluminum metal.
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Soln:
Data:
Mass of Al = 25g
Current = 2 A
R.A.M of Al = 27
Valence of Aluminum = 3
IF = 96500 C
Using the formula
M = ArIt / Vf
Where Ar is the relative relative mass.
Hence:
T = m × v × f / Ar × I
= 25 × 3 × 96500 / 27 × 2
= 2233.8 minutes
The time taken to deposited 25g of Aluminum is 37.23 hours
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