Unit 6: Reactivity
6.1: Metals and their reaction with oxygen
6.3: Reactions of metals with dilute acid
6.4: The reactivity series
6.6: Using displacement reactions
Metal + oxygen --> metal oxide.
Metals have different levels of reactivity
When a metal reacts with oxygen a metal oxide is formed.
6.2: Reactions of metals in water
6.5: Displacement reactions
Metal + water --> metal hydroxide + hydrogen.
Some metals will react with hot water or steam, but not with cold water.
The metals nearest the bottom of Group 1 in the Periodic Table react more vigorously than those at the top.
Magnesium + steam --> magnesium oxide + hydrogen.
Group 1 metals react vigorously with water.
Metal + dilute acid --> salt + hydrogen.
Different metals have different levels of reactivity in dilute acid.
When a metal reacts with dilute acid, the products are a salt and hydrogen.
Metals have different levels of reactivity.
The reactivity series is a list of metals with the most reactive at the top.
Copper sulfate + iron --> iron sulfate + copper.
Metals can be identified by observing their reactions.
More reactive metals can displace less reactive ones from solutions of salts.
The thermite reaction is a displacement reaction which can be used to weld railway lines together.
Displacement reactions are used to extract some metals from their ores.