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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