GCSE - Reactivity Of Metals Flashcards
Where are the most reactive metals in the periodic table?
Groups 1&2
What are some un-reactive metals?
Gold, silver, and platinum.
What are some reactive non-metals?
Hydrogen and carbon
How can the reaction between a reactive metal and water be sped up?
Use steam instead of water
When do displacement reactions happen and why?
Displacement reactions happen when a solid of a metal is placed in a solution of a metal that it is more reactive than because more reactive metals displace less reactive metals.
How can you rank metals in order of reactivity/
Using displacement reactions
Put each metal in each other metals solution and see where displacement reactions happen.
What do oxidised and reduced mean?
When a displacement reaction occurs between a metal and a metal oxide, the displacing metal is oxidised (becomes an oxide) and the displaced metal is reduced (no longer an oxide)
What is the chemical name for rust?
Hydrated iron oxide
What is rust an example of?
Corrosion
What does rust need to form?
Iron, water, and oxygen
Does mass increase or decrease during corrosion?
Increase
How can corrosion be prevented (barrier)?
Plastic coating, painting, varnishing, oil/grease, tinning (metal is covered with molten tin), electroplating (cover a metal in another metal by placing in metal solution and creating circuit)
How can corrosion be prevented (chemical)?
Galvanising (dipping metal in zinc so zinc corrodes), sacrificial protection (a more reactive metal is bolted onto the metal solution and it corrodes instead), alloying (mixing metals with other metals so they don’t corrode)
What are the methods of extracting metals?
Charcoal, coke, hydrogen, displacement, electrolysis, bio-leaching, phytomining.
How do you extract metals with charcoal?
Heating
