What is the reactivity series
Potassium, Sodium, Lithium, Calcium, Magnesium, Aluminium, Zinc, Carbon, Iron, Hydrogen, Tin, Lead, Copper, Silver, Gold
Which metals react with cold air?
From potassium to silver (Everything except gold)
Which metals react when heated in warm air?
Potassium to copper
metal + cold water =
metal hydroxide and hydrogen
metal + steam =
metal oxide + hydrogen
Why does aluminium not react with steam?
Aluminium is very quick to form aluminium oxide when in the presence of oxygen which stops the steam from coming in contact with the aluminium.
what happens when magnesium is placed into cold water and why?
There is almost no reaction. Magnesium becomes coated with the insoluble magnesium hydroxide which prevents water coming into contact with it.
What happens when a metal reacts with cold air?
They form a metal oxide
What would happen if you reacted potassium or sodium with an acid?
It would explode
what happens when magnesium is reacted with steam?
magnesium burns with a bright, white flame producing hydrogen and white magnesium oxide
Which metals react with hydrochloric and sulfuric acids?
From calcium to tin.
What will form when a metal reacts with a hydrochloric or sulfuric acid?
Hydrogen and a metal sulfate/chloride is formed.
What can you tell if a displacement reaction occurs between two metals?
The metal that takes the oxygen is more reactive.
What will happen if magnesium is heated with carbon dioxide?
It will become magnesium oxide and carbon.
What is oxidation?
The loss of electrons, gain of oxygen
What does it mean if a substance is oxidised?
It has lost electrons/gained oxygen
What is reduction?
The gain of electrons/loss of oxygen
What is a redox reaction?
A reaction in which one species is oxidised and another is reduced
What is a reducing agent?
A substance which reduces something else/gives electrons
What is an oxidising agent?
A substance which oxidised something else/gains electrons
what happens when you react zinc and copper sulfate solution?
The copper is displaced by the more reactive zinc. The blue copper solution fades as the colourless zinc solution is formed.
When does rusting occur?
When iron or steel react with oxygen and water.
Why will a bridge react faster if it close to the sea?
Salt speeds up the reaction.
What is a barrier method to prevent rusting?
Painting/oiling/greasing or covering iron in plastic, preventing oxygen or water from getting to it.
What is a sacrificial method to prevent rusting?
Metals that are more reactive than iron can be placed next to iron as they will react instead of iron, preventing the iron from rusting
What is an example of a sacrificial method to prevent iron from rusting?
Galvanising - coating iron with a layer of zinc. Zinc is more reactive than iron so it will react instead of the iron
What colour is litmus paper in acid?
What colour is litmus paper in bases?
What colour is methyl orange in acid?
What colour is methyl orange in a base?