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GCSE Chemistry 2017
Question | Answer |
---|---|
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 รท distance moved by the solvent |