topic 5 separate chemistry 1 Flashcards
where are the transition metals on the periodic table
in the middle
what are the properties of transition metals
they are shiny, malleable, strong, hard, conduct heat and electricity, high densities, high mp apart from mercury which is liquid at room temp
what are transition metals good at
being catalysts e.g iron is used as a catalyst in the haber process
what are the compounds of transition metals like
colourful
how are alloys made
by adding another element to a metal
why are alloys stronger than pure metals
they have different size atoms making it harder for the layers of atoms to slide over each other
how is steel made
iron and carbon
how is bronze made and what are its uses
copper and tin, medals and statues
how is brass made and what are its uses
copper and zinc, door fittings and taps
what are aluminium alloys used for
to make aircrafts
how is magnalium made and what are its uses
aluminium and magnesium, fireworks
what are some methods used to prevent rusting
painting, oiling or greasing, sacrificial protection e.g galvanising
what is galvanising
a coat of zinc is put onto iron to prevent rusting, zinc is more reactive, so it’ll lose electrons and corrode in preference to iron
what is electroplating
coating the surface of a metal with another metal using electrolysis, cathode is the object you cot, anode is the bar of metal for the plating
what do you use titrations to find out
how much acid is needed to neutralise a given quantity of alkali
