Question

The number of moles of electrons passed when the current of 2 A is passed through a solution of electrolyte for 20 minutes is ______.

Options

• 4.1 × 10⁻⁴ mol e⁻

• 1.24 × 10⁻² mol e⁻

• 2.487 × 10⁻² mol e⁻

• 2.487 × 10⁻¹ mol e⁻

Answer 1

The number of moles of electrons passed when the current of 2 A is passed through a solution of electrolyte for 20 minutes is 2.487 × 10⁻² mol e⁻.

Explanation:

Moles of electron = `"Charge"/"F" = ("Current" xx "Time")/96500`

`(2 xx 20 xx 60)/96500`

= 0.02487

or 2.487 × 10⁻² mol e⁻