5.8 Organic Chemical Analysis

Question 1

Chromatogram

Answer 1

A graph that shows the result of separating the components of a mixture by chromatography

Question 2

Chromatography

Answer 2

A technique used to separate mixtures due to the distribution of the substances between the stationary and mobile phase.

It can give information to help identify substances

Question 3

Formulation

Answer 3

A mixture that has been designed as a useful product.

They are made by mixing the components in carefully measured quantities to ensure that the product has the required properties

Question 4

Impure substance

Answer 4

A substance made up of two or more elements or compounds that are not bonded together chemically

Question 5

Litmus paper

Answer 5

Paper stained with litmus which can be used to indicate the acidity or alkalinity of a substance.

Used in the test for chlorine

Question 6

Mobile phase

Answer 6

Where the molecules can move during chromatography.

It is always a liquid or gas

Question 7

Precipitation

Answer 7

The creation of a solid from a solution

Question 8

Pure substance

Answer 8

In chemistry a pure substance is a single element or compound, not mixed with any other substance.

In everyday language, a pure substance can mean a substance
that has had nothing added to it, so it is unadulterated and in its natural state

Question 9

Rf value

Answer 9

The ratio of the distance moved by a compound to the distance moved by the solvent

Question 10

Stationary phase

Answer 10

Where the molecules are stationary during chromatography.

It is a solid or a liquid supported on a solid