Separating Techniques Flashcards
What is a solute
The substance which dissolves in a solution
What is the solution
The name for a mixture of a solute and solvent
What is a solvent
A liquid which dissolves a solute
How would you design an experiment to see how much salt can dissolve in water, (6)
Measure out your given volume of water using a measuring cylinder and pour it into a beaker.
Take your given amount of salt and weigh it
Add salt, one spatula at a time and stir until it dissolves
Stop when your salt no longer dissolves
Reweigh your container of salt to see how much you’ve used.
Each group uses a different volume of water and class results are collected.
What does “saturated” mean
When no more solute can dissolve in a solution
Give the 4 states + symbols
(s) = solid
(g) = liquid
(g) = gas
(aq) =aqueous- dissolved in water
What is filtration
The purpose of filtration is to separate an isolate solid from a solution.
Describe the process of filtration
Solid is left behind on the filter paper. Liquid containing any dissolve solids pass through
How does filtration work
The solid particles are too big to pass through holes in the filter paper. (Residue)
Give an example of filtration
Sand from salt water
What is the purpose of crystallisation
To separate a soluble solid from a solvent
Describe the process of crystallisation
Take your solution, heat until crystals start to form. Then leave in a warm place for he rest of the solvent to evaporate.
Give an example of crystallisation
Copper sulphate crystals from copper sulphate solution.
Give two mixtures which can be separated from filtration
Iron fillings and water
Sand and water
Give 3 mixtures which can be separated with crystallisation
Salt and water
Sugar and water
Copper sulphate and water