role of nacn in extraction of gold

What is the role of dilute NaCN in the extraction of gold ? Advertisement Remove all ads. Solution Show Solution. In the extraction of gold, dilute NaCN is used as a leaching agent. Gold is converted into a cyanide complex from which the metal is extracted later by replacement

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(ii) what is theroleofdilute nacn in the extraction of

(ii) what is theroleofdilute nacn in the extraction of

Apr 20, 2020 · NaCN forms a complex with gold, Na[Au(CN)2], which on reduction with Zn gives gold metal

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explain theroleof each of the following: (i)nacnin the

explain theroleof each of the following: (i)nacnin the

(i) The roasted ore of gold is leached with a solution of sodium cyanide in the presence of oxygen for many days. The role of NaCN in this process is to dissolve the gold to form an aurocyanide complex, from which the metal is obtained by displacement. 4Au + 8NaCN + 2H 2 O + O 2 ---> 4 Na [Au(CN) 2] + 4KOH. 2Na[Au(CN) 2] + Zn ---> Na 2 [Zn(CN) 4] + 2Au

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describe the role of (i)nacnin theextraction of gold

describe the role of (i)nacnin theextraction of gold

1) In the metallurgy of gold, gold metal is leached with a dilute solution of NaCN in the presence of air (for O2). The gold metal is then obtained from the product by displacement reaction. 2) it lowers the melting point of the mixture of Thanks and Regards

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describe theroleof (i)nacn in the extraction of gold

describe theroleof (i)nacn in the extraction of gold

1) In the metallurgy of gold, gold metal is leached with a dilute solution of NaCN in the presence of air (for O2). The gold metal is then obtained from the product by displacement reaction. 2) it lowers the melting point of the mixture of. ahlukileoi and 35 more users found this answer helpful. heart outlined

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write the chemical reactions involved in the process of

write the chemical reactions involved in the process of

The roasted ore of gold is leached with a solution of sodium cyanide in the presence of oxygen for many days. The role of NaCN in this process is to dissolve the gold to form an aurocyanide complex, from which the metal is obtained by displacement. 4 A u + 8 N a C N + 2 H 2 O + O 2 → 4 N a [A u (C N) 2] + 4 K O H 2 N a [A u (C N) 2] + Z n → N a 2 [Z n (C N) 4] + 2 A u

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describe role of nacn in extractionof silver from silver

describe role of nacn in extractionof silver from silver

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. Ag 2 S + 4NaCN → 2Na [Ag (CN) 2] + 4Na 2 S. 2Na [Ag (CN) 2] …

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answered: describe theroleof (i)nacnin the | bartleby

answered: describe theroleof (i)nacnin the | bartleby

(i) NaCN in the extraction of gold from gold ore. (ii) Si02 in the extraction of copper from copper matte. (iii) Iodine in the refining of zirconium. Write chemical equations for the involved reactions. *Response times vary by subject and question complexity. Median response time is 34 minutes and

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describe therole of nacn in the extraction of gold from

describe therole of nacn in the extraction of gold from

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. This conversation is …

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thecomparation of cyanide and cnlite gold leaching reagent

thecomparation of cyanide and cnlite gold leaching reagent

Cyanide is an essential agent for gold extraction by cyanidation. Commonly used cyanide agents are NaCN, KCN, NH4CN, CaCN2 and cyanide melts. The cyanide melt is a cheap cyanide, the useful component is 45% CaCN2, and the rest are impurities such …

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write the chemical reactions involvedin the process of

write the chemical reactions involvedin the process of

Best answer. Chemical reactions involved in the process of extraction of Gold : Dilute NaCN is used for leaching the metal forming an aurocyanide complex. Zn acts as a reducing agent in the extraction of gold from complex. Please log in or register to add a comment

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inthe cyanide process for extraction of goldand silver

inthe cyanide process for extraction of goldand silver

Silver and gold are extracted by the cyanide process (Mac Arthur - Forrest process). After the preliminary crushing and concentration by froth floatation process, the ore (crushed auriferous rocks in the case of gold) is leached with dilute (0.4 - 7%) solution of sodium cyanide made alkaline by adding lime kept agitated by a current of air

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explain therole of nacnin theextractionof silver is it

explain therole of nacnin theextractionof silver is it

Role 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. You should write a reaction along with the explanation

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