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.
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
A:
B:
C:
D:
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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.