Video: What is Electroplating Video Lecture | Chemistry for JEE Main & Advanced

Today before starting the class i would like to introduce a new website where you can watch live sports alhootship.rf.gd
Electroplating is the process of coating one metal object with another it works by electrolysis
Which is when electricity is used to drive a chemical reaction?
We're going to look at why you'd want to electroplate how it works and various conditions that need to [be] considered
So why would we want to do electroplating metals, maybe electroplated for aesthetics protection or both?
Aesthetics might involve making a metal shinier or giving it an attractive color by coating for example
jewelry is often plated gold or silver a
Metal coating can be used for protection as it may help resist corrosion
Rusting or just general wear and tear car rims are electroplated for both shininess and protection
Chromium commonly known as chrome nickel tin zinc and cadmium are often used to play copper iron and steel objects
tin cans are actually made of steel, but [have] a thin tin coating and
White the astronaut who made the first American spacewalk in 1965 was wearing a gold-plated visor to protect his eyes from the solar radiation
so how does electroplating work an
Electric current is passed through a solution that conducts electricity
Could an electrolyte to create this current two electrodes dipped into the electrolyte solution and connected to a battery or power supply
So we end up the set up that looks something like this
When the current is turned on the electrodes gain a charge
The positively charged electrode is called the anode and the negatively charged electrode is called the cathode
The electrodes and electrolyte are carefully [chosen] based upon
what metal you are plating with [if] you want to copy plate another metal you will use a copper [based] Electrolyte solution and
Have a copper anode the copper for the plating comes from the electrolyte solution which in turn has it stops replenished by the copper Anode
Want to watch live sports visit: alhootship.rf.gd
We want to copy place and brass so we have a copper anode a brass cathode and a copper based solution for the electrolyte
So copper sulfate solution
Copper sulfate Solution Contains blue Copper ions and Colorless sulfate ions
The Copper ions are positively charged and so attracted to [the] negatively charged brass cathode
the Copper Ions deposit onto the brass producing the thin copper plate
The positively charged copper ions gain electrons, which is known as reduction?
The Sulfate ions are negatively charged and so are attracted to the positively charged Copper Anode
The current supplied to the anode causes the copper atoms to oxidize which is lose electrons and then dissolve into the electrolyte solution
So the copper ions move from the anode to the cathode in the solution and the electrons move from the anode to the cathode
but along the wire
The Copper Anode bug gradually dissolves to replenish the copper ions in the electrolyte solution
So the solution stays at the same concentration
If another matter was used at the anode then the copper sulfate [solution] would get paler or less concentrated
so just remember that oxidation the loss of electrons takes place at the Anode and
reduction the Gain of Electrons takes place at the cathode
So few other things to consider in electroplating
the speed at which electroplating requires depends only upon the strength of the electric current a
Stronger current increases the speed at which the ions and electrons move through the circuit speeding up the plating process
One way to increase the current is by increasing the concentration of ions in the solution
It is also important to choose your metals carefully in electroplating not all metals [will] alloy with each other for example
Steel has to be copper plated and then silver-plated because it will not form a direct alloy with silver
There are also environmental concerns associated with some metals
Chrome plating for example creates waste materials which are dangerous to humans and animals?
Wears products have to be treated accordingly to make sure they are safe which can be very expensive
and
finally most importantly
For current to flow the ions need to be able to move so the compound must be Molten or dissolved in a solution
So in conclusion from this video you should understand how electroplating works using electrolysis
When the current blows the positive ions in the electrolyte
solution move Towards a negative cathode where they gain electrons which is reduction, and this is what causes the plating to occur at the
Anode the current causes the metal atoms to Lose electrons and dissolve into the electrolyte solution
The electrons which the metal atoms lose flowed back to the power source and around to the cathode
Losing electrons at the Anode is known as oxidation
So just remember we have reduction at the cathode and oxidation at the anode and that's electroplating
you