PHYSICS
JAMB 2016 - Question 30
Physics 2016 JAMB Past Questions - Question 30: 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 5.0 minutes, the current must be
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
C
Explanation
To calculate the current required for the deposition of 36.0g of silver, we can use the formula:
Charge (Q) = Current (I) × Time (t)
The charge required to deposit 36.0g of silver can be calculated using the electrochemical equivalent:
Charge (Q) = Mass (m) / Electrochemical Equivalent (E)
Substituting the given values:
Q = 36.0g / 0.0012g/C
Q = 30,000 C
Now, we can rearrange the formula to solve for the current:
I = Q / t
Substituting the values:
I = 30,000 C / (5.0 minutes × 60 seconds/minute)
I ≈ 100 A
Therefore, the current required to deposit 36.0g of silver by electrolysis in 5.0 minutes is approximately 100 Amperes.
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