Patterns Of Reactivity Flashcards
What is the word equation for metals reacting with water?
Metal + water = metal hydroxide + hydrogen
What is the word equation for metals when they react with acid?
Metal + acid = salt + hydrogen
Which metal resists corrosion because it forms a protective oxide layer?
Aluminium
What is the word equation between magnesium and sulphuric acid?
Magnesium + sulphuric acid = magnesium sulphate + hydrogen
What is the chemical name for rust?
Hydrated iron oxide
What are the 2 conditions needed for rusting
Water and oxygen
What are ships built from?
Steel
What is steel made from?
Iron
Why would a car not rust in the desert?
There isn’t enough water to start the rusting process
What is the word equation for rusting?
Iron + water + oxygen = hydrated iron oxide
Why is gold not a good alternative to steel?
Because it is very expensive
What is stainless steel made of?
Small amounts of chromium
Name 3 metals which react when put in the sea
Steel, copper, aluminium
What four methods are used to prevent iron from rusting?
Painting or oiling
Plastic coating
Galvanising
Sacrificial protection
How does plastic coating work?
It prevents air and moisture reaching the iron