In the process of extraction of gold, Roasted gold ore + CN – + H₂O → [X] + HO – [X] + Zn → [Y] + Au Identify the complexes [X] and [Y]

The process of extraction of gold involves the following reaction: - - 2 2 Roasted gold ore+CN +H O [Au(CN) ] +HO → - - 2 4 [Au(CN) ] +Zn Zn[(CN) ] +Au → So from the equations: X = - 2 [Au(CN) ] and Y = 2- 4 [Zn(CN) ] METALLURGY 37