Reactions of metals ( displacement, redox reactions etc)

What's reactivity

A measure of how vigorously a substance will react

What's formed when a metal reacts with water

a metal hydroxide and hydrogen gas

A metal below hydrogen in the reactivity series will/will not react with a dilute acid

Will not

What's formed when a metal reacts with a dilute acid

A metal salt and hydrogen

What is oxidation

The gain of oxygen or loss of electrons

What is reduction

The loss of oxygen or gain of electrons

what are redox reactions

reactions in which oxidation and reduction both take place

What are displacement reactions

When a more reactive metal displaces a less reactive one from its compound

What changes would you observe in a displacement reaction between magnesium and copper sulphate

- The blue colour of the solution fades as blue copper sulphate solution is replaced by colourless magnesium sulphate solution

- copper at the bottom of the beaker

How do you write an ionic equation

- Write out all the ions in each compound separately

- remove the spectator ion(s) from the aqueous solution

When do we extract a metal from its compound using carbon and how

If it's lower than carbon in the reactivity series and we reduce the metal oxide by reacting it with carbon to form pure metal and carbon dioxide

why do metals such as gold not need to be extracted

it's unreactive so it’s found uncombined in nature (on its own)

What's an ore

A rock that contains enough of a metal or metal compound to make extracting the metal worthwhile

What are the products formed when a metal oxide is reduced with carbon

Pure metal and carbon dioxide

What four metals are found uncombined in nature

Gold,platinum, copper, silver

When do we extract a metal using electrolysis

If it's higher than carbon in the reactivity series