Guest

Describe role of NaCN in extraction of silver from silver ore

Describe role of NaCN in extraction of silver from silver ore

Grade:12

5 Answers

Pooja
17 Points
7 years ago
Extraction of SilverRole of NaCN or KCN = In the extraction of gold and silver, the metal is leached with NaCN or KCN, which is an oxidation reaction.During the process, Ag is oxidised to Ag+ .Here M =Ag or Au.Subsequent reaction with Zn leads to formation of free metal.
Umakant biswal
5349 Points
7 years ago
dear pooja ,
in the extraction of gold and silver , the metal is leached with NACN or Kcn , which is an oxidation reaction , 
2- during this process Ag is oxidised to Ag + 
then the reaction with zn result in formation of free metal 
, if u want me to mention the reaction , then let me know , 
HOPE IT CLEARS 
REGARDS 
Muskan Kharbanda
11 Points
6 years ago
Role of NaCN in the extraction of silver (Ag) is to do the leaching of Ag ore in the presence of air from which the silver is obtained later by replacement.4Ag + 8CN- + 2H2O + O2 → 4 [Ag(CN)2-] + 4OH-
Md Sohail
11 Points
6 years ago
Silver and gold ores containing native metal are leached with a dilute solution of Sodium cyanide(NaCN) {or Potassium cyanide(KCN) } in the presence of air.This is an oxidation reaction. During this process Ag is oxidised to Ag + , then the reaction with Zn result in formation of free metal.Ag2S + 4NaCN --> 2Na[Ag(CN)2] + 4Na2S2Na[Ag(CN)2]+Zn --->Na2[Zn(CN)4]+4Ag(ppt.)
Kushagra Madhukar
askIITians Faculty 628 Points
3 years ago
Dear student,
Please find the solution to your problem below.
 
In the extraction of gold and silver , the metal is leached with NACN or KCN , which is an oxidation reaction, during this process Ag is oxidised to Ag+ then the reaction with Zn result in formation of free metal.
Ag2S + 4NaCN → 2Na[Ag(CN)2] + 4Na2S
2Na[Ag(CN)2] + Zn → Na2[Zn(CN)4] + 4Ag(ppt.)
 
Hope it helps.
Thanks and regards,
Kushagra

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free