Question

During electrolysis, 2A current is passed through an electrolytic solution for 965s. The number of moles of electrons passed will be
(a) 0.02
(b) 0.01
(c) 200
(d) 0.037

Answer 1

Answer:

(a) 0.02 moles of electrons

Explanation:

given:

          current = 2 A

          time = 965 s

According to Faraday formula

number of moles =$\frac{current\times time}{1 faraday}$

where 1 Faraday = 96500 $\frac{coulomb}{mol}$

∴ Number of moles of electrons passed  = $\frac{2\times 965}{96500}$

                                                                    = 0.02 moles of electrons

Answer 2

The number of moles of electrons passed will be 0.02

Explanation:

Moles of electron = 1 mole

According to mole concept:

1 mole of an atom contains $6.022\times 10^{23}$ number of particles.

We know that:

Charge on 1 electron = $1.6\times 10^{-19}C$

Charge on 1 mole of electrons = $1.6\times 10^{-19}\times 6.022\times 10^{23}=96500C$

To calculate the moles of electrons passed, we use the equation:

$I=\frac{q}{t}$

where,

I = current passed = 2 A

q = total charge = ?

t = time =  965 s

Putting values in above equation, we get:

$2A=\frac{q}{965}\\\\q=1930C$

Thus if on passing 96500 C of electricity = 1 mole of electron is used

1930 C of electricity =$\frac{1}{96500}\times 1930=0.02$ mole of electrons is used.

Learn More about faraday

https://brainly.in/question/10513111

https://brainly.in/question/1440189