Jan 09, 2018 Describe the role of (i) NaCN in the extraction of gold from its ore. (ii) Cryolite in the extraction of aluminium from pure alumina. (iii) CO in the purification of Nickel

Apr 20, 2020 NaCN forms a complex with gold, Na [Au (CN)2], which on reduction with Zn gives gold metal. This discussion on (ii) What is the role of dilute NaCN in the extraction of gold? is done on EduRev Study Group by Class 12 Students. The Questions and Answers of (ii) What is the role of dilute NaCN in the extraction of gold? are solved by group of

(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 + 2H2O + O2 --- 4 Na [Au(CN)2] + 4KOH 2Na[Au(CN)2] + Zn --- Na2[Zn(CN)4] + 2Au (ii) Copper matte contains Cu2S and FeS

Explain the role of each of the following. (i) NaCN in the extraction of silver (ii) S i O 2 in the extraction of copper. Hard. Open in App. Solution. Verified by Toppr. I) In the extraction of gold and silver the metal is leached with NaCN and KCN, which is a oxidation reaction

Sep 23, 2020 (i) Role of NaCN in the extraction of gold is to do leaching of gold ore in the presence of air from which the gold is obtained later by replacement. (ii)Carbon Monoxide acts as a reducing agent in the extraction of iron from iron oxide. pls mark as brainliest

Describe The Role Of Nacn In The Extraction Of Gold From. Click hereto get an answer to your question Describe the role of NaCN in the extraction of gold from gold ore. ii Sio, in the extraction of copper from copper matte. iii Iodine in the refining of zirconium

Nov 01, 2018 Describe the role of (i) NaCN in the extraction of gold from gold ore. asked Apr 24, 2018 in Chemistry by shabnam praween (137k points) cbse; class-12; 0 votes. 1 answer. Write the chemical reactions involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction

Finally, the variance analysis at a level of 95% confidence shows that the variables studied significantly influence the extraction of gold and is presented as an alternative to the use of NaCN

Cyanide Process. Cyanide process is also called as Macarthur-forest Process. It is the process of extracting gold or silver from the ores by dissolving in a dilute solution of potassium cyanide or sodium cyanide. This process was introduced in the year 1887 by the Scottish chemists naming Robert W. Forrest, John S. MacArthur, and William Forrest

Feb 19, 2011 To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au (s) + 8 NaCN (aq) + O2 (g) + 2 H2O (l) 4 NaAu (CN)2 (aq) + 4 NaOH (aq) (a) Determine the mass of gold that can be extracted if 21.4 g sodium cyanide is used

Mar 03, 2020 Question 2- Explain the role of: i) NaCN in the extraction of gold from gold ore. ii) SiO 2 in the extraction of copper from copper matte. iii) Iodine in the refining of zirconium

A leach using 8ppm dissolved oxygen yielded only 82.3% gold extraction with a 0.29kg/t NaCN consumed. The addition of lead nitrate, directly to the leach, showed 94.2% gold extraction with only 0.16kg/t NaCN consumption. A gold extraction of 95.0% was obtained by adding oxygen with lead nitrate. The laboratory results were found to be similar

The main role of N aC N in extraction of Gold is to do leaching of gold are in the presence of air. For example, 4Au(s)+8N aC N (aq)+H 2

Jul 19, 2021 Role of NaCN in the extraction of gold is to do the leaching of gold ore in the presence of air from which the gold is obtained later by displacement method. br সংশ্লিষ্ট ভিডিও

5 Answers. 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