Metal is precipitated from Au(CN)(4)^(3-...

Metal is precipitated from `Au(CN)_(4)^(3-)` using zinc as a precipitant. Along with Au, a complex compound of zinc is also formed as product. The `1^@` and `2^@` valencies in the complex are

`2,3`

`2,6`

`1,4`

`2,4`

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