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When impure (native) silver is reacted …

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When impure (native) silver is reacted with dilute aqueous solution of NaCN to form a water soluble complex then whose presence is necessary?
  • 2 answers

Khushi....? ??‍? 5 years, 5 months ago

Oxygen of course....

Gaurav Seth 5 years, 5 months ago

ANSWER : oxygen

A water soluble complex of silver with a dilute aqueous solution of NaCN is sodium argentocyanide. In the cyanide process, the native form is crushed and treated with 0.142% solution of NaCN and aerated. 

Argentocyanide is soluble. Further metal is recovered from the complex by reduction with zinc.

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