Electrolysis Flashcards
Anode
The electrode connected to the positive terminal of the battery
Cathode
The electrode connected to the negative terminal of the battery
Anions
negatively charged ions moving towards the anode
Cations
Positively charged ions moving towards the cathode
Hydrogen Properties and Uses
Properties: Flammable colorless odorless lighter than air
Uses:
used in fuel cells
used in acids
used to make hydrogen peroxide(H2O2)
Chlorine uses and properties
Properties:
Green gas at room temperature
poisonous
diatomic
Uses:
Bleaching Agent
Kills bacteria in water
Used to make HCl
NaOH aq Properties and Uses
Properties:
It is an alkali(Ph>7)
Corrosive
Uses:
Neutralize acids
Used in making toothpaste, detergents, washing powders
Inert Electrodes
Eg: palladium, platinum, and graphite
The electrolyte is used up
Electrodes are not used up so there is no need to replace them
Color of the electrolyte fades away because the ions of the electrolyte is used up
Active Electrodes
Electrodes are used up
Electrolytes are not used up (no need to replace them)
Color of the electrolyte doesn’t fade because the concentration of the ions in the electrolyte remains the same
Electro Plating
Better aesthetics
preventing corrosion
Electro Refining
Purifying the metal
Rule at Cathode
If there is more than one ion that needs to go to the cathode, the less reactive one will go and the more reactive one will stay
Rule at Anode
If there is a concentrated hallide, the hallide goes, otherwise the OH- moves to the anode and the other substance stays
Electrolysis
Electrolysis is the decomposition of an ionic compound when in molten or in aqueous solution, by the passage of electric current
Reactivity Series
Please send cats monkeys and colored zebras in large hired cages securely guarded
Potassium Sodium Carbon magnesium aluminum calcium Zinc Iron Lead Hydrogen copper silver Gold
