Production of chemicals by electrolysis Flashcards
(18 cards)
Electrolytic cells convert …
Electrical energy to chemical energy
What type of redox reactions occur in an electrolytic cell?
Non- spontanous
In an electrolytic cell the Anode is ….
Positive
In an electrolytic cell the Cathode is ….
Negative
At the anode does oxidation or reduction occur?
-Always oxidation
At the cathode does oxidation or reduction occur?
-Always reduction
In an electrolytic cell the cathode is ….
Negative
Why is electrolysis useful ?
- Re-charge batteries
-Plating metals
-Extracting reactive metals
Molten means what ?
Without water
What does inert mean ?
Non-reactive
What are advantages and disadvantages of molten electrodes?
Advantages- no water
Disadvantages - expensive and uses heaps of energy
How can electric charge be calculated ?
Current x time
What are Faradays first law of electrolysis
The mass of a metal produced at the cathode is directly proportional to the quantity of electricity passed through a cell
What is a faraday?
the charge on one mole of electron
1 faraday = …..
96500 coulombs mole -1
Faraday’s 2nd law of electrolysis ?
In order to produce one mole of metal, one, two, three or any whole number of moles of electrons must be consumed
Yield =…
amount of products
With Q=I x t , the time is measured in …
seconds
