2(d) Reactivity Series Flashcards
Reactivity
How easily an atom can gain or lose electrons
How can metals be arranged?
- Based on reactions with water and dilute HCl
- Based on displacement reactions
Based on reactions with water and HCl or H2SO4
Metal + Water -> Metal Hydroxide + Hydrogen
Metal + Acid -> Salt + Hydrogen
Based on displacement reactions
Metal + Oxygen -> Metal Oxide
Metal + Aqeous Metal Salt
Reactivity series
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Hydrogen
Copper
Silver
Gold
Conditions for Rust
Oxygen for oxidation
Water
Ways to prevent rust
- Barrier Methods
- Galvanising
- Sacrificial Protection
- Dessicant in container
- Store in vacuum container
Preventing Rust: Barrier Methods
Painting, covering with oil
Preventing Rust: Galvanising
Coating with zinc (which is more reactive than iron so reacts first)
Creates insoluble zinc oxide
Preventing Rust: Sacrificial Protection
Attach piece of zinc
Preventing Rust: Dessicant in container
Absorbs water vapour
Preventing Rust: Store in vacuum container
Keep O2 away
Oxidation
Gain of oxygen
Loss of electrons
Reduction
Loss of oxygen
Gain of electrons
Redox
A reaction where oxidation and reduction occur
