The purpose of the stream of air in the leach | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In the leaching of $Ag_2S$ (silver sulphide) with aqueous $NaCN$,the reaction is reversible:$Ag_2S + 4 NaCN \rightleftharpoons 2 Na[Ag(CN)_2] + Na

Vedclass · Accepted Answer

Oxidise $Na_2S$ formed into $Na_2SO_4$

Vedclass · Answer

(B) In the leaching of $Ag_2S$ (silver sulphide) with aqueous $NaCN$,the reaction is reversible:$Ag_2S + 4 NaCN \rightleftharpoons 2 Na[Ag(CN)_2] + Na_2S$To drive the reaction forward,the product $Na_2S$ must be removed.$A$ stream of air (oxygen) is passed through the solution to oxidise $Na_2S$ into $Na_2SO_4$ (sodium sulphate) and sulphur,preventing the reverse reaction.The overall reaction is: $2 Na_2S + 2 O_2 + H_2O \rightarrow Na_2SO_4 + 2 NaOH + S$ (or similar oxidation products like $Na_2SO_4$).

The purpose of the stream of air in the leaching process of $Ag_2S$ is to:

Similar Questions

Which one of the following oxides is reduced by water gas to obtain the metal during its extraction?

In the equation,$4M + 8CN^{-} + 2H_2O + O_2 \to 4[M(CN)_2]^- + 4OH^{-}$,the metal $M$ is

The incorrect statement about the Hall$-$Heroult process is:

Spelter is

Which metal cannot be extracted by the smelting process?

Vedclass Test Series

Exam Paper Generator

Online Exam Module