Studied by 4 people
Pure substance
A substance consists of a single element or compound.
Impurities
Cause variation in the melting and boiling points of the substance.
Ninhydrin
________) is sprayed on the chromatogram to make them visible.
Pure substances
Have a constant and fixed boiling and melting point.
RF value
Calculated by dividing the distance moved by the solute by the distance moved by the solvent.
Chromatography
A laboratory technique for the separation of a mixture.
Locating Agent
Used to analyze colourless substances in paper chromatography.
Simple distillation
Laboratory technique to separate pure solvent (liquid) from the solution.
Fractional distillation
Laboratory technique to separate miscible liquids with different boiling points.
Sublimation
A change directly from the solid to the gaseous state without becoming liquid.
Crystallization
To separate a pure solid from a solution.
Filtration
The process whereby fluids pass through a filter or a filtering medium.
Separating funnel
A piece of laboratory glassware used in liquid-liquid extractions to separate the components of a mixture into two immiscible solvent.
