*Topic 3 Patterns Of Reactivity Flashcards
Describe the reaction of metals with oxygen
Metal+Oxygen=Metal Oxide
Iron-orange sparks
Calcium-copper turns black
Magnesium-bright white light
Describe the reaction of potassium, sodium, calcium and magnesium with cold water
These metals react well with water
Why are potassium, sodium and calcium stored under oil
To prevent them reacting with the oxygen and water vapour in the air
Describe the reaction of calcium, magnesium, iron, zinc and copper with dilute acid
Magnesium, iron, zinc- fizzes, giving off hydrogen and forming a salt
Copper- no reaction
Give an example of
Metal+acid->salt+hydrogen
Magnesium+sulphuric acid->magnesium sulfate +hydrogen
Place metals in order of reactivity, based on observations/results of reaction with oxygen, water and acid
Potassium Sodium Lithium Calcium Magnesium Aluminium Zinc Iron Tin Lead Copper Silver Gold
Recall the reactivity series
Potassium Sodium Lithium Calcium Magnesium Aluminium Zinc Iron Tin Lead Copper Silver Gold
Explain what a displacement reaction is
If the metal on its own is more reactive than the metal in the compound then a reaction will take place
What is the chemical name for rust
Hydrated iron 111 oxide
Recall the conditions necessary for rusting to take place
Iron+water+Oxygen->hydrated iron
Describe methods for preventing rust formation
Painting or oiling
Plastic coating
Galvanising
Sacrificial protection
Explain what galvanising is and how it protects iron from rust
Galvanising is when iron objects are coated with a more reactive metal such as zinc or chromium
