Separating mixtures

Created by

Charvi M

Cards (19)

Pure describes.....
Natural substances that have not been processed or changed
Mixtures are...
Impure substances
Just one atom or molecule of something else makes a substance impure
How to use melting points to determine purity?
The melting point of a pure substance is single temperatures
whereas a impure substance:
Less than that of a pure substance
Range temperature (not just one)
Pure means...
A material that is composed of only one type of particle with distant chemical properties
Formulation means...
Mixtures where the substances are combined in exact amounts
what are the three types of chromatography?
thin layer chromatography, gas chromatography and chromatogram
what is the mobile phase?
the solvent that carries the soluble components of the mixture
what is the stationary phase?
a fixed absorbent material such as paper
Name all the famous people involved in creating the model of the atom in order.?
Dalton - 1803
Thomson-1897
Rutherford-1911
Bohr-1913
Chadwick-1932
What are isotopes? 
atoms of an element with the number of protons and electrons staying the same but the number of neutrons changing
how do you use the melting and the boiling point to determine a substance's purity 
the melting point of a pure substance is a single digit whereas if the substance is impure the melting point would be double didgits but the temperatures would also vary
what is an alloy? 
A mixture of two or more metals.
why are alloys stronger than normal metals?
alloys are stronger because the different sized atoms makes it hard for them to slide against one another
what is distillation ?
the process of heating a liquid mixture to the boiling point of one of the solvents and immediately condensing the resulting vapours
define solvent ? 
a liquid in which chemicals dissolve to make a solution
define solute 
a substance that is dissolved into a solvent
define aqueous solution 
a solution where a solute is dissolved in water
what is a solution?
a solute dissolved in a solvent