Key Definitions Flashcards
A Compound
contains the atoms of two or more elements chemically joined together
An Element
A substance made up of only one type of atom
Impure
A substance that is not pure
Melting point
A specific temperature at which a solid turns into a liquid.
Mixture
Two or more substances jumbled together physically
Physical Property.
A description of how a material behaves and responds to forces and energy. E.g hardness is a physical property.
Pure
A single substance that does not have anything else mixed with it.
Crystallization
Separating the solute from a solution by evaporating the solvent.
Filtrate
Solution passing through a filter
Filtration
Using a filter to separate insoluble substances from a liquid
hazard
Something that could cause harm
insoluble
Describes a substance that can not be dissolved in certain liquid
Residue
Material remaining in the filter after mixture has passed threw.
risk
The chance of a hazard causing harm.
Saturated solution
Contains the maximum amount of solute that can dissolve in that amount of solvent at that temperature,
solvent
The liquid in which a solute dissolves to make a solution.
chromatography
A technique used for separating the compounds of a mixture,
Paper Chromatography
Spotting drops of the sample onto paper, and then allowing the solvent to move up the paper. Different components in the samples travel up the paper in the solvent at different rates.
Stationary phase.
The surface through which the solvent and dissolved substances move up in chromatography.
Mobile phase
The solvent that moves along the paper carrying the dissolved substances with it.
chromatogram
The piece of paper showing the results of carrying out chromatography on substances.
Rf Value
Distance of compound [the spot] divided by the distance moved by solvent.
