SEPERATION TECHNIQUES Flashcards
A mixture
A mixture is a mix of two or more elements that can be easily separated back to there original singular element as they have not chemically bonded.
Why separate a mixture?
We could separate a mixture because we need an element in that mixture or purely just to find out what was in the mixture. We might also do this to to get a pure substance for example pure water from inky water.
Solution and solubility
Solubility is when you dissolve a solid (salt) into a liquid (water)
Solution is is when you mix two substances together and you get a solution. For example paint is a solution
Distillation
When you have a mixture like inky water and you want to get pure water all you have to do is evaporate you water as water has a lower boiling point than ink. Then it will go down the condenser where the tube is much cooler and the evaporated water will turn into water again. However this time it will just be pure water.
Filtration
You will put filter paper on top of a beaker in a cone shape with no gaps or holes. If you have a mixture of a solid and liquid than you can pour that mixture into your filter paper. The liquid will soak through leaving you with the solid alone in the paper and the liquid in the beaker.
Solubility
This is when you will dissolve a slid eg salt into a liquid eg water.
What technique to use?
To decide what technique to use you should make sure all of the techniques are in consideration and then pick what will benefit you the best for example if you are trying to separate two liquids then you couldn’t use the filter paper as everything would go through the filter paper. You would have to use distillation.
Evaporation
When some of the particles evaporate
Chromatography
When you match two different types of ink through putting the ink on wet paper
Compound
A compound is two or more elements that are chemically bonded
