SC2b - filtration and crystallisation Flashcards
How do filters work?
Trap large enough insoluble substances
Give some examples of daily objects using filtration
Cars, vacuums and air conditioning
What is a solution?
A mixture made of solutes in a solvent
What is crystallisation?
Where solutes can be separated from a solution by evaporation leaving the solute behind
If crystals form slowly…
The particles have longer to form an ordered pattern and will make larger crystals
What is a saturated solution
When no more solute can be dissolved by the solvent at that temperature
What is solution mining?
Where water is pumped into layers of salt underground which is then heated to evaporate the solvent and saturated the solution until a little more water evaporates for salt crystals to form
What is the residue?
The insoluble substances that can’t fit through the filter tunnel
What is the filtrate?
The solvent and solute that pass through the fine holes in the filter paper
What is a hazard?
Something that cause harm
What is a risk?
The chance the hazard causes harm
In crystallisation, how can the risk of spitting be reduced?
Wearing eye protection and taking the Bunsen burner before the solution is completely dry
