General Knowledge - Chemistry - Discussion
Discussion Forum : Chemistry - Section 1 (Q.No. 4)
4.
The metal used to recover copper from a solution of copper sulphate is
Discussion:
85 comments Page 1 of 9.
NAVNEET SINGH said:
1 decade ago
Because Fe have more reactivity then Cu, accordingly to electrochemical series. and also Fe have more reducing power than Cu. hence iron can be use to recover copper from their solution.
if we see the "electrochemical series" we found that.......
Li > K > Sr > Ca > Na > Mg > Al > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Cu > Ag > Hg > Pt > Au, our ans.
if we see the "electrochemical series" we found that.......
Li > K > Sr > Ca > Na > Mg > Al > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Cu > Ag > Hg > Pt > Au, our ans.
Haseeb Ahmed said:
1 decade ago
Since standard electrode reduction potential of iron is -0.44v and for copper is +0.344v, iron act as an reducing agent i.e. (easily oxidized and produces 2 electrons) while copper act as an oxidizing agent I. E (easily reduced by gaining electrons).
Remember one thing: higher the negative value of standard electrode potential, easily the oxidation take place of that element or vice versa.
Remember one thing: higher the negative value of standard electrode potential, easily the oxidation take place of that element or vice versa.
Appolinaire NGES said:
9 years ago
I hold Fe as the answer; since Fe is found above Cu in the electrochemical series, it will displace Cu from CuSO4 to give FeSO4 and metallic Cu.
We talk of the electrochemical or reactivity series instead of electromagnetic series.
Thanks for your various proposed answers.
Fe + CuSO4 --------- = FeSO4 + Cu.
We talk of the electrochemical or reactivity series instead of electromagnetic series.
Thanks for your various proposed answers.
Fe + CuSO4 --------- = FeSO4 + Cu.
Vicky said:
8 years ago
Fe is the right answer because ferrous is more reactive than copper due to which it will displace the copper from copper sulphate solution and the solution will become green in color due to the formation of ferrous sulphate and a brown layer of deposit layer will form on the iron metal.
J rey said:
1 decade ago
Because iron is more reactive than copper and has an oxidation number of 2, unlike we can say mercury but it is an liquid metal at room temperature, so there is a reaction mechanism here. And Electrochemistry is applied or ionic equilibria is also.
Sanyukta said:
9 years ago
According to metal activity series, Fe is more reactive than Cu that means no reaction should take place and a less reactive element cannot replace a more reactive element and hence no reaction should take place. Then how come Cu replaces Fe?
Jehangir said:
1 decade ago
Copper and iron both has great affinity for sulphate ions. So if we use iron as electrode. It will give e. And these will be accepted by cup ion and will deposit at cathode. So cu will deposit. And iron will disolve. So contration same.
Lenhkp said:
1 decade ago
Its a simple case of displacement reaction where, Fe being more reactive in the activity series of metal, replaces Cu from the CuSO4 solution to liberate free Cu.
Fe (more reactive) +CuSO4-->FeSO4 + Cu (less reactive).
Fe (more reactive) +CuSO4-->FeSO4 + Cu (less reactive).
Aditya said:
1 decade ago
Because iron is higher in the activity series than copper and we know that a metal higher in the activity series displaces the lower ones solution. Hence:-
CuSO4 + Fe--------------------------------->FeSO4 + Cu.
CuSO4 + Fe--------------------------------->FeSO4 + Cu.
Sarath sfc said:
5 years ago
Ag & Hg are less reactive than copper.
Adding sodium - it would ignite before it could react.
Fe is more reactive than copper and would displace it to combine with the sulfate ion, thereby separating copper.
Adding sodium - it would ignite before it could react.
Fe is more reactive than copper and would displace it to combine with the sulfate ion, thereby separating copper.
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