reactions of metals Flashcards
What happens in an oxidisation reaction
gaining oxygen is an oxidisation reaction
what happens when we react metals with oxygen
we form metal oxide and an oxidation reaction takes place
what happens to the metal when it reacts with o2
the metal ions are oxidised
what happens in reduction
metal compounds split into metal and oxygen or in other words oxygen is lost
what is reduction in terms of electrons
The gain of electrons
(OILRIG) m
What is oxidation in terms of electrons
the loss of electrons
OILRIG
What is formed when a reactive metal is reacted with water
A Metal hydroxide
Describe the reaction between water and Potassium
Potassium is the most reactive so reacts very quickly. The hydrogen produced ignites instantly and the metal also sets alight, sparking and burning with a lilac flame
Describe the reaction between water and Sodium
Sodium fizzes rapidly and melts to form a ball that moves around on the water surface
Describe the reaction between water and Lithium
Lithium fizzes steadily and floats, becoming smaller until it eventually disappears.
what gas is produced when metals are reacted with water
Hydrogen gas
Metals that don’t react with dilute acids
The only metals that aren’t reactive enough are copper, silver, gold and platinum.
Metals that do react with dilute acids
Metals don’t have to be that reactive to react with dilute acids.
The metals that react with dilute acids but not cold water are magnesium, aluminium, zinc, iron and lead (iron and lead react slowly).
What is produced when metals react with dilute acids?
1 A salt
2 Hydrogen gas
Why is carbon used to extract metals?
Reducing a metal with carbon will result in the extraction of the metal if the metal is lower in the reactivity series than carbon.
Carbon is used because it is cheap and abundant.
