Year 8-Separation Techniques Flashcards
What does distillation do ?
Distillation uses evaporation and condensation to obtain a solvent from a solution.
The process of distillation (using e.g: inky water )
As ink has a higher boiling point than water , a heat generator or bunsen burner is used and is needed to evaporate the water -we use their differences to our advantages . As the evaporated water (steam) goes down the condenser , a stream of cold water coming from a water in and ending at a water out as it surrounds a tube -the steam condense as it travels down and cools back into clear pure water in a beaker. whilst the ink is left in the flask.
How do we determine which separation technique to use.
Use the properties and differences of the two solvents -and use it to our advantages.
Give example of an advantage of differences (e.g :ink and water )
Ink has a higher boiling point , allowing the water to evaporate away -separating from the ink.
Separating techniques for metals from non-metal elements…
Use example iron and sand
Most metals are attracted to a magnetic force , (e.g: iron can be separated from sand using a magnet)
A sieve separates …
Solids from liquids , e.g water and peas.
Residue is ..
The Material blocked out/ filtered through , getting left over.
Solute is :
the solid to dissolve
Solvent :
The liquid
The solution :
The mixture
Liquids with higher boiling points :
Evaporate at hotter temperatures
Water boils at ..
100°C
Fill the missing words :
Liquids with _________ boiling points
Evaporate at cooler temperatures
Lower
How does filtering work
E.g : water particles in the liquid state , are smaller than the holes in a filter and passes through ,unlike solids.
An example of a separation through filtering technique.
Filtrate - the paper filter with small holes.
