Write the chemical reactions involved in the extraction of metallic silver from argentite.

Solution

In the metallurgy of silver metal is leached with a dilute solution of NaCN or KCN in the presence of
air (for O₂) from which the metal is obtained later by replacement:

{Ag}_{2} S + 4 NaCN ⇌ \underset{Sod . dicyanoargentate (I)}{2 Na [Ag ({CN}_{2})] + {Na}_{2} S} 4 {Na}_{2} S + {SO}_{2} + 2 H_{2} O \to 2 {Na}_{2} {SO}_{4} + 4 NaOH + 2 S ↓ 2 Na [Ag (CN)_{2}] + Zn \to \underset{Sod . tetra cyanozincate (II)}{{Na}_{2} [Zn (CN)_{4}] + 2 Ag ↓}

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

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General Principles And Processes Of Isolation Of Elements

Write the chemical reactions involved in the extraction of metallic silver from argentite.

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

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