Please enable JavaScript.
Coggle requires JavaScript to display documents.
Topic 1a - More Separating Techniques (Separating an insoluble solid and a…
Topic 1a - More Separating Techniques
Separating an insoluble solid and a liquid
Filtration is often used if your desired product is an insoluble solid that needs to be separated from a liquid
Fold a piece of filter paper into a cone
Place the filter paper point down into a filter funnel that's sitting in the neck of a container
Pour the mixture into the filter paper
The liquid will pass through the filter paper but the solid won't
Separating a soluble solid and a solution
There are two methods commonly used to remove a soluble product from a solution - evaporation and crystallisation
Evaporation
Really quick way of separating a soluble salt from a solution but you can only use it if the salt doesn't decompose when heated
Pour the solution into an evaporating dish
Place the evaporating dish on top of a tripod and gauze and place a Bunsen burner underneath
Slowly heat the solution. The solvent will evaporate. Eventually the solid will form
Keep heating the evaporation dish until all you have left is a dry solid
Crystallisation
Takes more time but can produce crystals
Place an evaporating dish on top of a tripod with a gauze mat. Place a Bunsen burner underneath
Pour the solution into the evaporating dish and gently heat it
Once some of the solvent has evaporated, or when you see crystals start to form, remove the dish from the heat and leave it to cool
Filter the crystals out of the solution, and leave them in a warm place to dry