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Cyanide or Macarthur Forrest Process

Ag is precipi...

Question

Ag is precipitated when Zn is added to $[A g (C N)_{2}]^{-}$ .
If $2 [A g (C N)_{2}]^{-} + Z n \to [Z n (C N)_{4}]^{2 -} + 2 A g$ is the reaction enter 1 else 0.

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Solution

Process of extraction of $A g$ (silver) is called cyanide process as sodium cyanide solution is used. The ore is crushed, concentrated and then treated with $N a C N$ solution. The reaction forms sodium-argento cyanide.
$A g S + N a C N ⇌ 2 N a [A g (C N)_{2}] + N a_{2} S$
This solution of sod. argento cyanide combines with $Z n$ -dust and form sod-tetracyano zincate and silver is precipitated out.
$Z n + 2 N a [A g (C N)_{2}] ⟶ N a_{2} [Z n (C N)_{4}] + 2 A g$
Hence, 1.

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Similar questions

Q. The chemical reactions involved in the extraction of metallic silver from argentite is -

2 N a [A g (C N)_{2}] + Z n \to N a_{2} [Z n (C N)_{4}] + 2 A g ↓

If the statement is true enter 1 else 0.

Q. Name of the process is cyanide process, in which we added Zn to soluble

[A g (C N)_{2}]^{-}

to get Ag. If true enter 1 else 0.

Q. In cyanide method, silver metal is obtained as given in the following reaction:

2 K [A g {(C N)}_{2}] + Z n ⟶ K_{2} [Z n {(C N)}_{4}] + 2 A g

Q. Zinc is used for the recovery of Ag from the complex

[A g (C N)_{2}] -

while copper is not used because Zn is powerful reducing agent than Cu.
If true enter 1,else enter 0.

Q. Silver metal is recovered industrially by using the chemistry shown below. Which of the following statements is/are not true ?

2 K [A g (C N)_{2}] + Z n \to 4 K_{2} [Z n (C N)_{4}] + 2 A g

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