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GCSE Chemistry 2017

QuestionAnswer
What's is the change between solid and gas called? Sublimation
What's the change between gas and solid? Deposition
How are the particles in a liquid displayed? Loosely compacted/random/close together
How are the particles in a gas displayed? Randomly placed/far apart
To separate an insoluble solid from a liquid what method would you need to use? Filtration
An example of a mixture that can be separated by crystallisation is? Water and table salt
What is the action of purifying a liquid by a process of heating and cooling? Distillation
What is Sedimentation Sedimentation is when the water stays in the tank for days and the big bits sink to the bottom, and the water stays at the top.
What does Chromatography do? It pulls the mixture up separating it to show what colours it is composed of.
What does Rf value stand for? Rf = distance moved by the compound ÷ distance moved by the solvent
Created by: MalakAli
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