In the silver plating of copper, K[Ag(CN...

In the silver plating of copper, `K[Ag(CN)_(2)]` is used instead of `AgNO_(3)` . The reason is

Athin layer of Ag is formed on Cu

More voltage is required

`Ag^(+)` ions are completely removed from solution

Less availability of Agions, as Cu can not displace `Ag^(+)` from `[Ag(CN)_(2)]^(-)`, ion

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IUPAC name for K[Ag(CN)_2] is

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In the electroplating of silver, AgNO_(3) solution is usually used as an electrolyte.

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Two electrolytic cells containing CuSO_(4) and AgNO_(3) respectively are connected in series and a current is passed through them until 1 mg of copper is deposited in the first cell. The amount of silver deposited in the second cell during this time is approximately [Atomic weights of copper and silver are respectively 63.57 and 107.88 ]

In a silver plating system, an electrolysis current of 5.0 A is used for a certain time and 0.5 mol of silver is deposited. How many moles of copper and iron will be deposited in their respective plating system if an electrolysis current of 10.0 A is passed for twice the time for silver plating. ( Relative atomic mass of silver=107.3, of copper -63.54, of iron=55.85).

Assertion : Zinc is used for the recovery of silver from the complex [Ag(CN)_(2)]^(-) Reason : Zinc is more electropositive than silver and is a better reducing agent.

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AAKASH INSTITUTE- ALCOHOLS, PHENOLS AND ETHERS-Assignment Section -D (Assertion - reason type question)

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