Which metal is leached from its ore using KCN | vedclass

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

Question

(C) The extraction of gold $(Au)$ and silver $(Ag)$ from their native ores involves leaching with a dilute solution of $NaCN$ or $KCN$ in the presence

Vedclass · Accepted Answer

Gold

Vedclass · Answer

(C) The extraction of gold $(Au)$ and silver $(Ag)$ from their native ores involves leaching with a dilute solution of $NaCN$ or $KCN$ in the presence of air $(O_2)$,which provides the necessary oxygen to oxidize the metal.The chemical reaction for gold is:$4Au(s) + 8CN^-(aq) + 2H_2O(aq) + O_2(g) \rightarrow 4[Au(CN)_2]^-(aq) + 4OH^-(aq)$This process is known as the MacArthur-Forrest cyanide process.

Which metal is leached from its ore using $KCN$?

Similar Questions

In the electrolytic process of extraction of aluminum,what is used as the electrolyte?

The purest form of iron is prepared by oxidising impurities from cast iron in a reverberatory furnace. Which iron ore is used to line the furnace? Explain by giving the reaction.

Bessemerization is involved in the extraction of which metal?

Who studied the plots of $\Delta G$ versus $T$?

Case hardening is a process of heating steel in an atmosphere of:

Vedclass Test Series

Exam Paper Generator

Online Exam Module