Separating Techniques - Definitions Flashcards
Acids (non - metal oxides)
Are compounds which have replaceable hydrogen ions.
Base (metal oxides)
A substance that can neutralise an acid.
Acid = salt + water
Chemical change
New substances are formed
Chromatogram
Piece of paper used in chromatography
Chromatography
The technique used for separating different soluble dyes
Condenser
Equipment which turns gas into liquids
Dissolving
When a solid separates and speeds out through a liquid
Evaporation
When a liquid is heated and turned into a gas
Filtrate
The solution that has been through filter paper and collected in the flask bellow
Filtration
The technique used for separating insoluble solids from a liquid
Fractional distillation
The technique used to to separate several liquids from each other
Immiscible
The term for two liquids which do not mix
Oil and water
Insoluble
A solid which does not dissolve in water
Miscible
Two liquids which do mix
Mixture
Two or more substances which are not chemically combined
Physical change
No change of substance, just of physical state
Pure substance
One element or compound. Precise boiling or melting point.
Rate of reaction
How quickly the reaction takes place
Residue
The solid left in the filter paper after filtration takes place
RF value
In chromatography, distance the dye has travelled divided by the the distance the solute has travelled
Saturated solution
No more solid can dissolve
Separating funnel
The piece of equipment used to separate immiscible liquids.
Simple distillation
Separates a solute from a solvent
Solubility
Mass of solute that dissolves on 100g of solvent
