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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
The correct electronic configuration of Ti(Z= 22) atom is: (1) 1s 2 , 2s 2 , 2p 6 , 3p 6 , 4s 2 , 3d 2 , (2) 1s 2, 2s 2 , 2p 6 , 3p 6 , , 3d 4 , (3) 1s 2 , 2s
A water solution contains 64% Na 2 S 2 O 2 together with 1.0% soluble impurity. Upon cooling to 5°C, Na 2 S 2 O 2 ·5H 2 O. crystallizes out. The solubility of this hydrate is 1.35
The state of a galvanic cell without liquid junction, when its temperature and pressure are uniform, can be fully described by values of the variables T, p, and ξ. Find an expressi
In CH2=C=CH2 it is given that the length between H of first carbon at top and H of last carbon at top is L1 and length between H of first carbon at top and H of last carbon at bot
Q. Importance of Moisture content of the flour? Moisture content of the flour is an important parameter and does not remain the same throughout the period of storage. As the fo
Nitration or Direct method The number of - NO 2 groups introduced in benzene nucleus relies upon the nature and concentration of the nitrating agent, temperature of nitration
metals iron, aluminium, copper, gold, etc. have great industrial significants. which are their important ores? important alloys of iron, aluminium and copper and their uses.
what are valence electrons? and how do you write them?
C3N4
Which one is least ionic in the following compounds: (1) Agcl (2) Kcl (3) Bacl 2 (4) Cacl 2 Ans: Agcl
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