Question

differentiate between Nelson cell and downs cell with reaction​

Answer 1

$\huge \mathfrak{answer}$

Some CaCl2 is add to lower the melting point of Nacl from 801 ℃ to 600 ℃ . The cell consists of an iron vessel. A large block of graphite acts as an anode. Above the anode there is an iron dome for the collection of chlorine. The cathode is made of iron or copper. It is seperate from anode by iron gauze screen. When electric current passes through molten Nacl, following reaction take place.

Nacl ⮂ Na+ + Cl–

Na++ e– → Na (at cathode)

2Cl– → Cl2+ 2e– (at anode)

The sodium collects over cathode and chlorine over anode. They are take out from different holes.

Advantages of Down’s cell Process:

The metallic fog is not produce.

Liquid Sodium is collect at 600c.

It gives 99.9% Pure Sodium.

Materials of the cell is not attack by the products form during electrolysis.