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In gold mining , cyanide solutions are often used to dissolve AuBr from ore samples. In the presence of cyanide ions, CN-, gold forms a soluble complex according to the following reaction: Au+ + 2CN- ? Au(CN)2-. The formation of this complex causes the AuBr in the ore to dissolve. The Au(CN)2- complex has a Kform = 2.0x1013 and the Ksp of AuBr is 5.0x10-13.

Write a balanced chemical equation for the dissolution of gold bromide in a sodium cyanide solution and calculate the overall equilibrium constant for this reaction

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Category:- Chemistry
Reference No.:- M9460131

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