New Test Thursday Flashcards
What is Metallic Bonding
the electrostatic force of attraction between positively charged ions and delocalised electrons
Why are metallic elements conductors of electricity?
because they contain delocalised electrons
show the reaction of metals with oxygen
Metal + Oxygen -> Metal oxide
show the reaction of metals with water
Metal + Water -> metal hydroxide + Hydrogen
show the reaction of metals with acids
Metal + Acid -> Salt (metal chloride) + hydrogen
Why are metals arranged in the reactivity series
To show the rate of which metals react
How do you produce soluble salts?
excess metal is added to the appropriate acid; the mixture is filtered and the filtrate evaporated to dryness
During the extraction of metals, what are formed
metal ions are reduced forming metal atoms
T or F: The method used to extract a metal from its ore depends on the position of the metal in the reactivity series
True
What is electrolysis
the decomposition of an ionic compound into its elements using electricity
when should you use a d.c supply
if the products of electrolysis are to be identified
positive ions gain what
electrons at the negative electrode
negative ions lose what
electrons at the positive electrode
How is the heat alone method carried out?
(diagram)
How is the heat and carbon method carried out?
Diagram)
How is the metal reacted with water reaction carried out?
(method)
How is the metal reacted with acid reaction carried out?
(method)
Draw the reactivity series
(drawing)
What is an Alloy?
An alloy is a mixture of 2 or more elements where atleast one element is metal.
Why are alloys made?
To increase strength, to increase corrosion resistance, to make cheaper
What is an everyday example of an alloy?
A gold ring is made of gold and copper, as it cannot be pure gold. Gold is too flimsy.
Aluminium metal is used to make aircraft, saucepans, window frames and cooking foil. State 3 properties which make it suitable for the use it is put
Conducts heat, flexible, lightweight
What is it meant by recycling metals?
To turn old, unused metals into something new.
why do we recycle metals?
Metals don’t decompose, and are in high demand. Therefore, we recycle metals to stop pollution and save our metal supply.
