Electrolysis In Depth
In depth mindmap of electrolysis but no half equations.
hope you find this useful
Abdullah
- Created by: Abdullah-A
- Created on: 31-01-15 21:43
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- Electrolysis
- Electrodes
- Positive electrode- anode
- Negative ions are attracted to the anode, these are called anions
- Negative electrode- cathode
- Positive ions are attracted to the cathode, these are called cations
- P.A.N.I.C- Positive Anode, Negative Is Cathode
- Positive electrode- anode
- Electrolysis can only work in molten or liquid compounds because current cannot pass through solid ionic compounds
- Electrolysis of Lead Bromide
- Lead Bromide solution is the electrolyte
- The lead ions are attracted to the cathode
- The bromide ions are attracted to the anode
- Bromide gas is given off
- Electrolysis of Brine
- Brine is concentrated sodium chloride solution
- Sodium Hydroxide, chlorine and hydrogen gas are products of this
- The sodium hydroxide is used as bleach for cleaning
- Chlorine is used to kill bacteria in pools
- Hydrogen is used as fuel
- The sodium is more reactive than the hydrogen
- The positive hydrogen ions move to the cathode
- The sodium stays in the electrolyte and becomes sodium hydroxide
- The Chlorine ions move to the anode and chlorine gas is produced
- Redox Reactions
- When an ion gains electrons it is reduced
- When an ion loses electrons, it is oxidised
- Electroplating
- The negative electrode is made of the object to be electroplated
- The positive electrode is made of the metal to coat the object with
- The electrolyte is the solution of the coating metal
- Extraction of Aluminium
- Aluminium ore is known as bauxite
- We extract aluminium oxide from bauxite and purify it
- Aluminium oxide's boiling point is too high so we dissolve it in molten cryolite to lower it
- Electrolysis of Aluminium oxide
- The electrodes are made up of graphite
- The anodes need to be replaced regularly
- Aluminium forms at the cathode and it is tapped off
- The oxygen produced becomes carbon dioxide and burns away the anodes
- The electrodes are made up of graphite
- This makes it cheaper
- Electrolysis of Aluminium oxide
- Aluminium ore is known as bauxite
- Electrodes
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