Revision Flashcards
(25 cards)
Where are the metals in the P.T
On the left
What are Alloys
A mixture of metals
What is the reactivity series of metals
Potassium, sodium, calcium, magnesium, aluminium, zinc, iron, lead, copper, silver, gold
Which metals react with cold water
Potassium,sodium, calcium
Which metals do not react at all
Lead, copper, silver, gold
2 equations to show sodium reacting with water
Sodium + water -> sodium hydroxide + hydrogen
How do metals react with acids?
Metal salt + hydrogen
What is oxidation?
Reactions where oxygen is added to a substance
An equation to show iron rusting?
4Fe + 3O2 -> 2Fe2O3
What is reduction?
Where oxygen is taken away
What processes can help reduce the rusting of iron
Paint, coat in plastic, coat with oil,
What is a displacement reaction?
A displacement reaction is when a more reactive metal takes the place of a less reactant metal from a compound to form a new compound
Equation to show magnesium reacting with copper sulphate
My + CuSO4 -> MgSO4 + Cu
Sodium + iron nitrate ->
Sodium nitrate + iron
Zinc + copper sulphate ->
Zinc sulphate + copper
Lead + zinc nitrate ->
Zinc nitrate + lead
Why is rust an example of oxidation
Rust reacted with the iron to make iron oxide
What is the formula for iron oxide
Fe2O3
What is rust
Iron oxide
What do metals react with
Metals react with oxygen and water in the air to make oxides. They corrode
What is combustion
Combustion is when you burn things. Only two things that are made which are carbon dioxide and water. Burning is a common name for combustion. We always use oxygen
What is an exothermic reaction
An exothermic reaction gives out heat energy. The temperature rises in our surroundings
What is an endothermic reaction
An endothermic reaction take sin heat an ergo from the surroundings.
What is a decomposition reaction
A decomposition reaction is when it breaks something down.
