Mixtures and other things Flashcards
(23 cards)
Mixtures are substances that are not
Chemically joined up
Such as the gases in air
Name a common method of making a mixture
Dissolution
The solid being dissolved is called
The solute
The liquid a solid is dissolved into is called
The solvent
The mixture of solute and solvent is called
The solution
What does soluble mean?
It will dissolve
What is it called when you cannot dissolve any more solute at that temperature.
Saturated
How do you increase the solubility?
Increase the temperature
Why does more solute dissolve in solvent at higher temperatures ?
Because particle move faster
Can solute dissolve in all solvents?
No
Eg salt dissolves in water but not petrol
Name 4 separation techniques to separate out mixtures.
Filtration
Evaporation
Chromatography
Distillation
Name 3 uses of chromatography
Separating inks
Identifying blood samples
Investigating chlorophyll
Simple distillation can be used for separating
A liquid from a solid
Fractional distillation separates out
A. Mixture of liquids
Give an example of simple distillation
Separating water from seawater
Give 2 examples of fractional distillation
Distilling whisky
Separating crude oil from petrol
Name some molecules
O2
H2
N2
That is, the same atoms are joined
Name some compounds
Water H2O
Iron sulfide FeS
What is solubility?
A measure of how much solute is dissolved
What is the symbol for sodium chloride (salt)?
NaCl
Does a compound behave in the same way as the constituents ?
No
Iron is magnetic but iron sulfide FeS is not magnetic
If a compound breaks apart, the new substances are called
Products
What is the symbol for magnesium?
Mg
