Transition Metals, Alloys And Corrosion Flashcards
Describe how iron can be used as a catalyst
It is used in the Haber process to produce ammonia
Describe how platinum and rhodium can be used as an catalyst
They are used in catalytic converters in cars
When compared with alkali metals, transition metals have…
- lower reactivity
- higher melting points
- higher density
- greater strength and hardness
What are the transition metal special properties?
- can form ions with different positive charges
- can form different coloured compounds
- often used as catalysts
List some properties of alloys
- contains 2+ elements
- ions are different sizes
- harder than pure metals
- distorted layers
What is brass an alloy of?
Copper and zinc
What does adding zinc to copper do, and what are some uses of the product?
Adding zinc makes it more malleable
Brass can be used for hinges, locks, plumbing and plug sockets
What is bronze an alloy of?
Copper and tin
What does adding tin to copper do to it, and what are some uses of the product?
Adding tin increases the hardness of the material
Bronze can be used for making coins, electrical hardware and statues
What feature of an aluminium alloy makes them suitable for manufacturing planes?
Low density
What are some uses of aluminium alloys?
Planes, armour plating for military vehicles
What is steel an alloy of?
Alloy of iron that contain carbon as well as other metals
What are some properties of high carbon steels, and what are their uses?
Strong but brittle
Can be used to make cutting tools and blades
What are some properties of low carbon steels, and what are their uses?
They’re soft but malleable
Uses include making car bodies
What are some properties of stainless steels, and what are their uses?
Strong and resistant to corrosion
Uses are cooking utensils and cutlery
