Flashcards
Simple& fractional Distillation, crystillisation
Cards in this deck (7)
- 1what does Simple Distillation separateused to separate a liquid from a solution
- 2How does simple distillation work?The solution(seawater) in the distillation flask is heated and the solution with the lowest boiling point will evaporate (water)
-the water vapour rises and passes through the condenser where it cools and condenses
- the water flows into the beaker where it is collected
You will end up with salt left in the flask - 3What is the problem with simple distillation?You can only use it to separate things with very different boiling points
- 4What does Fractional Distillation separate?Mixture of liquids
- 5How does Fractional distillation work?-put your mixture in a flask and attach a fractioning column above the flask
- when you heat the flask the different liquids will all have different boiling points so they will evaporate at different temperatures
- the liquid with the lowest boiling point evaporates first (when the temperature on the thermometer matches the boiling point of the liquid it will reach the top of the column
Liquids with higher boiling points might also start to evaporate(the the column is cooler towards the top so they will only get part of the way up before condensing back down towards the flask)
- When the liquid has been collected , raise the temp until the next one reaches the top - 6What does crystallisation separate?Soluble solid from a solution
- 7How does crystallisation work?- Heat up the solution
- some of the water will evaporate and the solution will get more concentrated
-Once some of the water has evaporated or when some crystals starts top form remove the dish from the heat and leave solution to cool
- the salt should start to form crystals as it becomes insoluble in the cold , highly concentrated solution
-filter the crystals out of the solution and leave in a warm place to dry
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- Chemistry Flashcards on Simple& fractional Distillation, crystillisation, created by Ellaine Wahome on 28/08/2021.
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- Ellaine Wahome
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