Answer :
The time taken to deposit 1.63 g of Ni is 391 seconds.
How to find the number of moles ?
The number of moles of Ni deposited is:
Moles = [tex]\frac{1.63}{58.69}[/tex]
= 2.77 × 10⁻² mol Ni
Half reaction for Ni⁺² is:
Ni⁺² + 2e⁻ → Ni
Thus, for every mole of Ni, we need 2 moles of electrons.
Therefore, Number of moles of electron is:
2 × (2.77 × 10⁻²) = 5.55 × 10⁻² mole⁻
Charge = Moles × Faraday constant
= 5.55 × 10⁻² × 96485 = 5358.7 C
Thus, time taken is:
Time = Charge/Current
[tex]Time = \frac{5358.7}{13.7} = 391 sec[/tex]
Thus from the above conclusion we can say that The time taken is 391 seconds.
Learn more about Faraday constant here:
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