ELECTROYLSIS
- Created by: Chelsey`Johnson
- Created on: 22-05-16 18:07
View mindmap
- ELECTROLYSIS
- ELECTROLYSIS
- the breaking up of a compound using electricity
- the electrolyte (liquid which conducts electricity) is made up by melting or dissolving ionic compounds
- ionic compounds conduct when molten or in solution as the ions are free to move/flow
- electrons are lost at the anode (positive electrode) and gained at the cathode (negative electrode)
- MOLTEN IONIC COMPOUNDS
- can be electrolysed as ions move freely
- broken up into their elements
- +ve ions are called CATIONS as they're attracted to the -ve CAThode
- -ve ions are called ANIONS because there attracted to the +ve ANode
- LEAD BROMIDE
- at the CATHODE: Pb2+ 2e- -> Pb
- at the ANODE: 2Br- -> Br2 + 2e-
- EXTRACTING ALUMINIUM
- aluminium oxide is dissolved in molten cryolite
- electrodes made of graphite to conduct electricity
- positive Al3+ ions gain electrons at the cathode
- reduction: Al3+ -> 3e- + Al
- negative O2- ions lose electrons at the anode
- oxidation: 2O2 -> O2 + 4e-
- ELECTROLYSIS OF BRINE (sodium chloride solution)
- CATHODE
- hydrogen gas given off -> 1 hydrogen molecule
- 2H+ + 2e- -> H2
- sodium hydroxide is left in solution
- ANODE
- chlorine gas oven off -> 1 chlorine molecule
- 2Cl- -> Cl2 + 2e-
- CATHODE
- PANIC
- Positive = Anode Negative Is Cathode
- ELECTROLYSIS
Comments
No comments have yet been made