Flashcards
C5 Separating mixtures (Practical)
Cards in this deck (9)
- 1What is the purpose of filtration?to separate an insoluble solid from a liquid
- 2How can filtration be used in purification?It can remove solid impurities from a reaction mixture
- 3How do you carry out filtration?You place filter paper into a funnel and put the mixture into it. the liquid runs through, leaving behind the solid residue
- 4what is a solute?a dissolved solid
- 5What is the purpose of crystallisation?to separate a soluble solid from a solution
- 6How do you carry out crystallisation?pour the solution into an evaporatetion dish and gently heat it. once some of the solvent begins to evaporate or you see crystals, remove the dish from the heat. the salt should start to form crystals as it becomes insoluble. filter the crystals out of the solution.
- 7Why should you remove the dish from heat after some solvent has evaporated?If you evaporate all the solvent, the crystals would be tiny and your substance could decompose.
- 8What is the purpose of simple distillation?to separate out a liquid from a solution, or separate liquids that have very different boiling points.
- 9How can you use distillation to separate pure water from sea water?1. connect the bottom end of the condenser to a cold tap using rubber tubing. run the cold water through it to keep it cool
2. gradually heat the distillation flask
3. the water, due to its low boiling point will evaporate, and the vapour will pass through the condenser, and be collected into the beaker.
Information
- Description
- GCSE Chemistry (C5 chemical analysis) Flashcards on C5 Separating mixtures (Practical), created by lily bevan on 29/04/2018.
- Created by
- lily bevan
- Views
- 0
- Rating