C5 - Chemical Changes Flashcards
Reactivity Series Order Highest - Lowest
Potassium, sodium, lithium, calcium, magnesium, aluminium, zinc, iron, tin, lead, copper, silver, gold.
How is the reactivity series ordered?
Placed in orders by their reactions with water and dilute acid.
What happens when hydrogen is given off the reaction?
The gas pops with a lighted spill.
What will happen if a more reactive metal and a less reactive metal come together?
The more reactive metal will displace a less reactive metal from its aqueous solution.
Why can non-metals hydrogen and carbon be given positions in the reactivity series?
The basis of displacement reaction.
What is oxidation?
- The loss of electrons.
What is reduction?
The gain of electrons.
What is a metal ore?
- Contains enough of the metal to make it economic to extract the metal.
- Ores are mined and might need to be concentrated before the metal is extracted and purified.
How can un-reactive metals be founded?
In their native state.
How can the reactivity series help you with metal extraction?
- Decides the best way to extract a metal from its ore.
- Oxides of metals below carbon in the series can be reduced by carbon to give the metal element.
How are more reactive metals than carbon extracted?
- Cannot be extracted from their ores using carbon.
- Extracted by using electrolysis of the molten metal compound.
What is salt?
- A compound formed when the hydrogen in an acid is wholly or partially replaced by metal or ammonium ions.
How can salt be made?
- Reacting a suitable metal with an acid.
- Metal must be above hydrogen in the reactivity series but not dangerously reactive.
What happens during a reaction with a metal and an acid?
Hydrogen produced as well as salt.
Sample of salt made can then be crystallised out of solution by evaporating off the water.
What is the reaction between a metal and an acid a reaction of?
- A redox reaction.
- Metal atoms lose electrons and are oxidised and hydrogen ions from the acid gain electrons and are reduced.
