What element is used in electroplating?
What affects deposition rate in electroplating?
What does electrolysis mean?
Electrolysis, process by which electric current is passed through a substance to effect a chemical change. The chemical change is one in which the substance loses or gains an electron (oxidation or reduction).
What is the formula for electrolysis?
m = E x I x t /96,485, where m is the mass of the substance produced in g; Z is the electrochemical equivalent, which is the mass of a substance produced at the electrode during electrolysis by one coulomb of charge; I is the current in Ampere(A); t is the time in seconds; and 96,485 is the Faraday's constant and is ...
What do you call the substance broken down by electrolysis?
Negatively charged ions move to the positive electrode during electrolysis. They lose electrons and are oxidised . The substance that is broken down is called the electrolyte.
What are the rules for electrolysis?
Electrolysis of dissolved ionic compounds
- the metal is produced at the cathode if it is less reactive than hydrogen.
- hydrogen is produced at the cathode if the metal is more reactive than hydrogen.
How do ions move in electrolysis?
The ions must be free to move, which is possible when an ionic substance is dissolved in water or it is melted. ... Positively charged ions move to the negative electrode during electrolysis. They receive electrons and are reduced . Negatively charged ions move to the positive electrode during electrolysis.
Why are metals bent and shaped?
Metals are malleable - they can be bent and shaped without breaking. This is because they consist of layers of atoms that can slide over one another when the metal is bent, hammered or pressed.
Why can Metals bend without breaking?
The valence electrons surrounding metal ions are constantly moving. This makes metals good conductors of electricity. ... This allows metals to bend without breaking. Metals are both ductile (can be shaped into wires) and malleable (can be shaped into thin sheets).
Why is metal solid?
In metals, the electrons leave the outer shells of metal atoms , forming positive metal ions and a 'sea' of delocalised electrons. Metals are solids at room temperature, so the structure of a solid metal consists of closely packed metal ions.
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