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Electro refining of Copper
Cathode pure thin sheet of copper lined with graphite so that the deposited copper can beremoved easily.Anode blister copper (got above)Electrode reactionCopper sulphate dissociatesCuSO4 ------------Cu2+ + SO42-H2O -------- H+ +OHAt the cathode the copper ion changes to copper atom by gaining two electrons whichget deposited in the pure copper rod.Cu2+ +2e- ------- CuThe sulphate ion and hydroxide ion move towards anode but none of them is discharged.The copper anode itself loses electrons and gives copper ion in the solution.At the anode Cu - 2e------- Cu2+The impure block of copper thus will be used The impurities settles at the bottom of theelectrolytic cell. This is known as anode mud or slime.The impurities iron, zinc etc ionize and dissolves in the copper sulphate solution. They are above copper in the activity series. So they can displace copper from copper sulphate solution.The weight of cathode will increase. The copper obtained is 100%pure.e
excration of group1 from its materials
Price ceiling problems: The persistent shortage created by price ceiling will in turn pose the following problems: Rationing Government may have to apportion the quantity s
Q. Explain Extraction of Sulphur? The most important method for the extraction of sulphur from native deposits is the frasc process developed by Herman frach in 1891. It consis
The equilibrium constant Kp=4 at 1993K for the reaction H2+CO2->H2O+CO. INitially H2 and CO2 having 0.8 moles were injected in 5l flask. Find equilibrium concentration of CO2.
what is the graph between magnification and image distance for a convex lens..and how can we find the focal length for the lens using the graph? Ans) The distance between the len
Calculate the ratio of d number of molecules in two energy levels at 27''c given E2=9.75x10"-13erg/mol E1=6.95X10"-13erg/mol g1=2 g2=3
Q. Explain about Dihalide? Dihalides: Dichlorides and dibromides are formed by the lower members of the group, viz., Se, Te and Po. These are formed mainly by dissociation of t
the structure of a periodic table
Isomers, which vary in the orientation of groups around the double bounded carbon atoms, are known as geometrical Isomers. It is also known as Cis-Trans Isomerism.
i need to know the answer for dis-advantage of scale and sludge
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