JAMB - Physics (2018 - No. 13)
The electrochemical equivalent of silver is 0.0012g/C. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5mins, the current must be?
6000A
100A
10A
1A
Explanation
Given Data: Mass of Ag = 36.0g,
Z which is electrochemical equivalent of Ag = 0.0012coulomb
t = 5mins → 5 * 60 = 300secs.
Using M =Z * I * t
make I the subject of the formula
I = \(\frac{M}{Z * t}\) → \(\frac{36}{0.0012 * 300}\)
Current (I) = 100A
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