electrorefining d block phyllisdianacindy zhang

7/25/2019 Electrorefining d Block Phyllisdianacindy Zhang

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Do you wanna be rich?

We can help

you!

Let's see a video first which

teaches you the way to be rich!


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Electrorefnin

Phyllis ZhangDiana GaoCindy Zhang


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Electrorefn

ing is theprocess opuriying ametal byelectrolysis

.


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+

Slab of impure copper

containing such impurities

as: Zn, Pb, AgAnode

Pure "u

"athode

- #" powersupply

"uS$%a&


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"uS$%a&

Pure "u

"athode

#" power

supply- +

"u, Zn, Pb, Ag

(amine

the

followingcell

Zn2+

Zn2+

Pb2+

Cu2+

Cu2+

Cu2+

Cu2+Cu2+

Cu2+ Cu2+


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)he cathode reaction:

The Cu2+ in solution is preferentially

reduced at the cathode but none of the

Pb2+or Zn2+can be reduced.(Cu2+

exists in larer a!ounts and has a

hiher reduction potential than Zn2+

and Pb2+

."


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#n su!!ary$

%o !etals abo&e Cu on the table can

oxidi'e and o into solution and no !etalbelow Cu on the chart can reduce and co!e

bac) out of solution. *s a result only Cu is

in&ol&ed in both the oxidation and reduction.

#!pure anode pure cathode


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(ercise****P2,

*n aueous solution of n/was

electroly'ed usin tin electrodes. The anode

contained a few percent of sil&er copper and

'inc as i!purities. 0hich substances(s" will beoxidi'ed at the anode? 0hich substances(s"

will be reduced at the cathode?


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Applications

lead

copper

gold

silver+inc

aluminium

chromium

cobalt

manganese

the rare*earth and alali metals


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1iblioraphy$

the &ideo$

http$&.you)u.co!&3showid3456)75D8w5T52.ht!l

the pictures$http$i!ae.baidu.co!

infor!ation$

http$en.wi)ipedia.orwi)i8lectrorefinin


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That's all!Thank

you!


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Zn

"u

*

*u

Pt

Pb

electrorefining d block phyllisdianacindy zhang

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