which sulphide ore is concentrated by leaching and not by froth floatation and why?
Froth Floatation method is used for that metals whose ore gets preferably wetted by the oil and the gangue by the water. The sulphide ores preferably wetted by the oil and the gangue with the water. Hence this method is suitable for the concentration of the sulphide ore.
However Silver being less reactive metal is extracted or concenntrated by leaching
Silver sulphide is one of the example of extracted by the process of leaching.
Reaction Involved
Ag2S + NaCN → Na[Ag(CN)2] + Na2S
Note - Leaching is the method to extract minerals from a solid by dissolving them in a particular liquid.
However Silver being less reactive metal is extracted or concenntrated by leaching
Silver sulphide is one of the example of extracted by the process of leaching.
Reaction Involved
Ag2S + NaCN → Na[Ag(CN)2] + Na2S
Note - Leaching is the method to extract minerals from a solid by dissolving them in a particular liquid.