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Let cook fantastic colors coloring. We will use the property of some natural dyes to change color under the influence of the environment - the same property, by which we were able to transform plants in improvised indicators.

The English writer Rudyard Kipling is the poem "the Blue rose" is about a girl who rejected a bouquet of red roses, and the young man who went in search of blue, but never found them:

    "In vain I traveled all the light -
    Blue roses under the sun no.

Just as there is no light or green peonies or yellow lilies or raspberry daffodils. And yet you can see with your own eyes...

In a flask or beaker, mix 50 ml medical ester with the same amount of concentrated ammonia solution is a reagent for producing a fantastic bouquet. Please remember that a pair of ether is highly flammable, and therefore, close should not be a fire. In addition, both liquids sharp smell, so the experience should be conducted in a fume hood or, at least, in the open air.

The flower, the color of which you want to change, put on the mixture of liquids. Some time later (the exact time will have to determine in practice, for each color) the color will change. Both liquid that you use volatile. Ether vapor is extracted dyes flower of the plant cells, and a pair of ammonia create the petals in an alkaline medium. The dyes and change color, like laboratory indicators.

Processed in this way several different flowers, you will receive incredible bouquets. If you are going to surprise with unusual colors of their friends, be aware that the bouquet should be prepared shortly before the demonstration, because treated with a mixture of ammonia and ether flowers quickly fade.

It would seem, in an acidic medium under the action of vapors of any acid, the colour of the flowers must be restored. Unfortunately, this is not the case: in the flowers go and irreversible processes, therefore, to restore the previous color is not always possible.

O. Holguín. "Experiments without explosions"
M., "Chemistry", 1986


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