Question

# How is silver extracted from argentite?

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Hint: Silver is mostly extracted from its ore by the process of smelting and chemical leaching. Argentite is the ore of silver with formula $A\mathop g\nolimits_2 S$. it is extracted by the process commonly known as Mac Arthur and Forrest‘s Cyanide process.

$A\mathop g\nolimits_2 S + 4NaCN \to 2Na\left[ {Ag\mathop {\left[ {CN} \right]}\nolimits_2 } \right] + Na2S$
$2Na\left[ {Ag\left\{ {CN} \right\}} \right] + Zn \to N\mathop a\nolimits_2 \left[ {Zn\mathop {\left\{ {CN} \right\}}\nolimits_4 } \right] + N\mathop a\nolimits_2 S$