Chapter 1 - Solutions And Mixtures Flashcards
What is Filtration?
Filtration uses a filter. This acts like a sieve to separate insoluble substances. A filter is a barrier with microscopic holes in it.
What is Magnetic Separation?
Magnetic separation allows iron and steel to be removed from piles of non-magnetic materials.
What is Electrostatic Separation?
Electrostatic separation involves giving particles an electric charge and then passing them between electrically charged plates.
What is Chromatography?
Chromatography is a process that can separate a mixture by making it move through another substance like a paper strip.
What is Gravity Separation?
Gravity separation uses gravity to separate heavier substances from a suspension.
What is Evaporation?
Evaporation is the process in which heat causes a liquid to change into a gas. This leaves behind any solutes that were dissolved in the liquid.
What is Distillation?
Evaporation is the process in which a liquid turns into a gas. Condensation is the opposite: a gas cools to form a liquid. Distillation uses both evaporation and condensation to separate substances.
What is Adsorption?
Adsorption uses substances such as carbon to separate chemicals from water and air.
In adsorption, the chemicals being removed stick to the outside surface of another substance
What is a Solution?
This is what is meant when something dissolves. A substance that dissolves like this is said to be soluble. A substance that does not dissolve is said to be insoluble.
What are characteristics of Solutions?
Solutions can be coloured or colourless. For example, blue copper sulfate solid dissolves in water to form a blue-coloured solution. You know that a solution has been formed because
you can see straight through it.
What is the difference between Colourless and Clear?
Colourless and clear are not the same. Clear means you that can see though it. Colourless means it is not coloured.
What is one way of telling whether something is a solution?
Light passes easily through a solution, allowing you to see through it. This is one way of telling whether a mixture is a solution or not.
What is Concentration?
Concentration is a measure of the amount of solute dissolved in a known amount of solvent.
What is Centrifuging?
A simple centrifuge has chambers that are spun very fast around a shaft. Any tiny particles suspended in the liquid are forced to the sides and then the bottom of each chamber.
What is Sieving?
A sieve is a barrier with holes in it. Small solid particles can get through but large ones cannot.
