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Zn amalgam is prepared by elctrtolysis o...

Zn amalgam is prepared by elctrtolysis of aqueous `ZnCI_(2)` using 9 gram Hg cathode how much current is to be pased through `ZnCI_(2)` solution for 1000 seconds to prepare a Zn amalagam with 25% by weight ? (atomic masss Zn =65.4 g)

A

Current off `8.85` amp is passed in the process.

B

Current of `5.65` amp is passed in the process

C

Mass of `Zn` in Amalgam is `3gm`

D

Mass of `Zn` in Amalgam is `6gm`.

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
Let `x` gm of `Zn` deposit of `9gm` of `Hg`
`%` of `Zn` in Amalgam`=(m_(Zn)xx100)/(m_(Zn)xxm_(Hg))=x/(9+x)xx100=25`
`:.x=3gm`
Eq. of `Zn=(3xx2)/(65.4)`
`(n_(Zn))/1=(n_(e^(-)))/2=Q/(2f)=("it")/(2f)`
Current `i=6/(65.4)xx96500/1000=8.85amp.`
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