Thames & Kosmos Glowing Chemistry handleiding

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Luminol

In its pure state, luminol is

actually a yellowish powder.

The name comes from Latin

lumen

= light, and you only

need a very small amount of it

for light experiments. To make

it easier to measure out, the

luminol in your kit is mixed with

a non-reactive substance,

sodium sulfate.

Potassium

hexacyanoferrate(III)

This substance, also known as

potassium ferricyanide, once

went by the names red prussiate

and Prussian red. It used to be

produced by heating a mixture of

dried blood, iron powder, and

other substances. It forms nicely

water-soluble red crystals.

Hydrogen peroxide

This substance is composed

of a molecule almost

identical to water, with the

addition of an extra oxygen

atom. It therefore readily

releases oxygen and turns

to water in the process. In diluted

form, it is used for bleaching hair (“peroxide

blonde”) and to kill germs in medicine and

water processing, and in concentrated form

it is used as a source of oxygen in the engines

of rockets and torpedoes.

Sodium carbonate

This substance, which used to be called

washing soda, is the sodium salt of

carbonic acid. At one time, it was obtained

from certain salt seas and used for washing

clothes. Today, sodium carbonate is produced

in huge quantities from rock salt and carbon

dioxide, and it has many uses: in glass

production, for

smelting steel,

in the chemical

industry, for

making washing

detergent, and in

paper production.

red = oxygen atom

white = hydrogen atom

blue = nitrogen atom

red = oxygen atom

black = carbon atom

white = hydrogen atom

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