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Nickel Sheet by Electrowinning from Nickel Sulfate
Electrolytic nickel is won from a nickel salt solution: pass a direct current from an inert anode through nickel sulfate solution and the nickel plates out on the cathode. A flat stainless steel plate makes a reusable cathode; when the deposit is thick enough, strip it off as a sheet of nickel.
The picture: our diagram of the cell.
Advanced
One to several days
Instructions
1
1
Make the solution
Make the solution
Dissolve nickel sulfate in warm water in the tank, about 250 g per litre.
Materials for this step:
Nickel Sulfate Hexahydrate2.5 kg
Water10 litersTools needed:
Electrolysis Tank
Digital Kitchen Scale
Chemical-Resistant Gloves
Safety Glasses2
2
Hang the electrodes
Hang the electrodes
Hang a clean flat stainless steel plate as the cathode (−) between inert anodes (+), not touching.
Tools needed:
Stainless Steel Sheet
Inert AnodeElectrolysis Tank3
3
Electrowin
Electrowin
Pass direct current and let the nickel build up on the cathode; see the notebook for how much a given current and time deposit.
Tools needed:
DC Power SupplyChemical-Resistant Gloves4
4
Strip the sheet
Strip the sheet
Lift out the cathode, rinse it, and peel the nickel deposit off the stainless plate as a sheet. Clean the plate and use it again.
Tools needed:
Chemical-Resistant GlovesSafety Glasses5
5
Faraday's law
Faraday's law
Loading Jupyter Notebook...
Tools Required
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