Chapter 24: Chromatography

Binder

________: forms a film that holds the pigment in place.

Solvent

________: used to dissolve the other components and alter the viscosity.

Paper chromatography

________ is used to separate mixtures of soluble substances.

Separation

________ by chromatography produces a chromatogram.

exact ratios

Formulations are very important in the pharmaceutical industry where the ________ of each component must be precise.

Impurities

________ will change the melting and boiling point of a substance.

sample

If the ________ has the same melting or boiling point as the substance, then we can confirm that the substance is pure.

Pigment

________: gives the paint colour.

exact quantities

Paint contains the following substances in ________:

impure substance

A(n) ________, or mixture, produces two or more spots.

mobile phase

The ________ is the solvent that moves through the paper, carrying different substances with it.

Pigment

gives the paint colour

Binder

forms a film that holds the pigment in place

Solvent

used to dissolve the other components and alter the viscosity

Other examples of formulations are

fuels, cleaning agents, alloys, fertilisers and foods

Formulations

useful mixtures with a precise purpose

purity

only contains one compound or element

Rf equation

distance travelled by substance / distance travelled by solvent

Mobile phase

where the molecules can move, liquid or gas

Stationary phase

where the molecules can't move, solid or really thick liquid