In cyanide extraction process of silver pond argentite ore name the oxidizing and reducing agents.write the chemical equations of reactions involved
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Explanation:
The extraction of silver involves in cyanide process are
(i) Ag
2
S+2CN
−
+O
2
→23[Ag(CN)
2
]
−
+SO
2
(ii) [Ag(CN)
2
]
−
+Zn→[Zn(CN)
4
]
2−
+Ag
Thus, in (i) O
2
−act as oxidising agent (oxidise sulphide to SO
2
) and in (ii) Zn act as reducing agent (reduce Ag
+
to Ag).
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