Separation techniques
14 review questions with answers for Separation techniques. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Method to separate sand from water?
- Crystallisation
- Distillation
- Chromatography
- FiltrationRight answer
What this set covers
Choosing the right method to separate a mixture. Filtration, crystallization, simple and fractional distillation, chromatography and using a magnet appear, with the terms residue, filtrate, solute and solvent, and an Rf calculation.
- Common mix-up
- Students often mix up residue and filtrate: the residue is the solid left on the filter paper, while the filtrate is the liquid that passes through.
- Review tip
- Cover the answers, then for each mixture in the set name the method and one reason it works, and finish by working out an Rf from 2.0 cm and 8.0 cm.
All 14 questions and answers
Method to separate sand from water?
Answer: Filtration
Solid left behind on the filter paper?
Answer: Residue
Liquid that passes through the filter paper?
Answer: Filtrate
Substance that dissolves in a liquid, such as salt in water?
Answer: Solute
Liquid in which a substance dissolves?
Answer: Solvent
Method to obtain solid salt from salt solution by evaporating and cooling?
Answer: Crystallisation
Method to obtain pure water from seawater?
Answer: Simple distillation
Method to separate ethanol from a mixture with water?
Answer: Fractional distillation
Part of a distillation apparatus that cools vapour back into a liquid?
Answer: Condenser
Method to separate the coloured dyes in an ink?
Answer: Chromatography
Rf of a spot that moves 2.0 cm when the solvent moves 8.0 cm?
Answer: 0.25
Number of spots a pure substance gives in paper chromatography?
Answer: One
The chromatography start line is drawn in pencil because ink would…?
Answer: Run with the solvent
Easiest way to separate iron filings from sulfur powder?
Answer: Using a magnet
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.