Grade 12Inorganic Chemistry
Describe role of NaCN in extraction of silver from silver ore
5 Answers
Pooja
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
Approved Tutor Answer9 Years agodear 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
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
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
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
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
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