Flashcards in Topic 5 - Separate Chemistry 1 Deck (23):
Transition Metals properties
Typical metallic properties.
Transition Metals as catalysts
Iron is used in the Haber Process for producing ammonia
Vanadium Pentoxide V2O5 is a catalyst for producing Sulfuric Acid.
Transition metal compounds are
Eg. Fe2+: orange, Cu2+ Blue,
Why are alloys harder than Pure Metals
Different sized atoms disrupt the lattice preventing sliding.
Why Iron is alloyed.
Adding carbon makes steel. (1% carbon)
More rust resistant
Copper + Tin
Harder than copper.
Used in metals and decorations.
Copper + Zinc
More malleable than bronze,
Lower friction (water taps and door fittings)
Zinc, copper, silver added to strengthen
Pure Gold: 24 Carat
18 carat: 75%
Used in aircraft
Pure aluminium is not strong enough other metals added.
Aluminium + Magnesium (5%)
Stronger, lighter, corrodes less.
Used in cars and aircraft
Used for fireworks
Corrosion of Metals
REDOX reactions. Metal is oxidised. (Gains oxygen). Oxygen is reduced (loss)
When rusting happens
Oxygen in air and water
Prevent rusting : Painting
Coats Iron with a barrier, this keeps out water and oxygen.
Placing a more reactive metal on the outside to make the oxygen and water react with it instead
A layer of zinc is placed. Acts as a sacrificial protection so it will be oxidised instead of iron
Used to coat the surface of metals using electrolysis
Cathode in electroplating
The object being electroplated:
Contains ions of the electroplating metals
Use of electroplating
Reduce corrosion or if jewellery used for decoration.
Purpose of titrations
To find concentrations, How much acid is needed to neutralise a given quantity of alkali (vise-versa)
Burette filled with