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Zinc is used but not copper for the recovery for metallic silver from the complex [Ag(CN)2]-,

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asked Dec 18, 2017 in Chemistry by sforrest072 (157,439 points) ● 61 ● 411 ● 949
retagged Dec 18, 2017 by sforrest072

Zinc is used but not copper for the recovery for metallic silver from the complex [Ag(CN)2]-, although electrode potentials of both zinc and copper
are less than that of Ag. Explain why ?

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answered Dec 18, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 15
selected Dec 18, 2017 by sforrest072
 
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[Hint : Zinc reacts at faster rate as compared with copper, further zinc is cheaper
than copper.]

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