SEPAR ATING MIXTURS Flashcards
What is the process of separating a solid from a liquid using a filter called?
Filtration
True or False: Crystallisation is used to separate a dissolved solid from a solution.
True
Fill in the blank: In chromatography, substances are separated based on their ______ in a solvent.
solubility
What technique would you use to separate a mixture of sand and water?
Filtration
What is the main purpose of using chromatography?
To separate and identify different substances in a mixture.
Which method is best for obtaining pure salt from seawater?
Crystallisation
In chromatography, what is the stationary phase?
The phase that does not move,
e.g. paper
What does a chromatogram represent?
The results of a chromatography experiment, showing the separated substances.
True or False: Solubility is the ability of a substance to dissolve in a solvent.
True
What is the solvent in a solution?
The substance that dissolves the another substance (the “solute”), The solvent is usually present in a larger amount compared to the solute - meaning that it is the liquid the solute is mixed into.
Identify the method: Separating the colored dyes in ink.
Chromatography
What is filtration?
Separating a liquid from undissolved solids by passing it through tiny holes, usually in paper
Fill in the blank: when no more solute can be dissolved in a solvent the solution is said to be______ .
saturated
Which of the following is NOT a method of separation: A) Filtration B) Crystallisation C) Evaporation D) Mixing?
D) Mixing
What type of mixture can be separated by filtration and give an example?
An insoluble solid from a liquid e.g. sand and water
True or False: Evaporation can be used to separate a soluble solid from a liquid.
True
In a chromatography experiment, what is the mobile phase?
The phase that moves, typically a liquid carrying the substances.
What do you call the solid that forms when a solution is cooled in crystallisation?
Salt crystals (precipitate)
What is the purpose of using a solvent in chromatography?
To help carry the substances to be separated.
Fill in the blank: The process used to separate a soluble solid (ie a solid that dissolves) from a liquid is called ______.
evaporation
What is meant by ‘soluble’?
A substance that can dissolve in a solvent.
What equipment is commonly used in filtration? (name 2)
Filter paper and a funnel.
What is the role of heat in crystallisation?
when a solution is heated, the solvent evaporates and crystals of the solute are left behind.
True or False: A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.
True
What happens to the solubility of most solids as temperature increases?
It increases.
