In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false ?

Question

Aicharya · Accepted Answer

Hall heroult process:

In the Hall-Héroult process the following simplified reactions take place at the carbon electrodes:

Cathode:

A l^{3 +} + 3 e^{- 1} \to A l

Anode:

O^{2 -} + C \to C O + 2 e^{-}

Overall:

A l_{2} O_{3} + 3 C \to 2 A l + 3 C O

And

2 A l_{2} O_{3} + 3 C \to 4 A l + 3 C O_{2}

In reality, much more

C O_{2}

is formed at the anode than

C O :

Cryolite (

N a_{3} A l F_{6}

) lowers the melting point of the mixture and make it more conductive in nature so as to carry out electrolysis of the ore in Hall-Heroult process. ^

In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is…