Question

How many faradays are required to reduce 1 mole of bro3- to br-?

Answer 1

Answer:

3

Explanation:

1 mol contains  6.023*10^{23}  atoms.

Charge required to reduce 1 mol  Br^{3+}  to  Br  is

3*6.023*10^{23}*1.602*10^{-19}=3*96500\;Coulombs .

We know  96500 \;Coulombs  which is equal to 1 Faraday . The number of Faradays required is  \frac{3*96500}{96500} =3\;Faradays .