Electroplating

Also called

electrolytic cell · silver plating · electrodeposition · cathode and anode · object as cathode · Faraday's laws of electrolysis · first law of electrolysis · mass deposited proportional to charge · Q = It · one faraday 96487 coulomb · silver nitrate solution · Ag+ ions · chrome plating · gold plating · विद्युत लेपन · विद्युत अपघटन · फैराडे का नियम

Topics

• In electroplating the object to be coated is the cathode, joined to the negative terminal of the battery.
• The anode is a bar of the plating metal, here silver, dipped in a solution of its own salt, silver nitrate.
• At the anode silver atoms lose electrons and enter the solution as Ag⁺ ions: Ag → Ag⁺ + e⁻.
• Ag⁺ ions drift to the cathode, gain electrons and settle on the spoon as a skin of silver: Ag⁺ + e⁻ → Ag.
• Faraday's first law: the mass deposited is proportional to the charge passed, Q = I × t.
• One mole of electrons (96 487 C, one faraday) deposits one mole of silver, about 108 g.
• The solution stays the same strength: every ion that deposits is replaced by one from the anode.
• Chrome bumpers, gold-plated jewellery and tin-plated cans are coated in the same way.

About this model

A GLB file of about 318 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Model, science and animation: Lably (built procedurally with three.js; no downloaded meshes). | CC BY 4.0. Original geometry and animation made for Lably.

More in Chemistry

1-Bromo-2-methylbutane molecular structureClass 123D model

1-Bromo-3-methylbutane molecular structureClass 123D model

1-Bromopentane molecular structureClass 123D model

1-Chlorobutane moleculeClass 123D model

1-Chloropropane moleculeClass 123D model

1-Ethoxy-2-nitrocyclohexane molecular structureClass 123D model